Fix Ruff's minimum python version

[nanonanomachine]

Rationale

pedalboard supports python version >=3.8 ref.

However Ruff's latest 0.9.10's target-version is 3.9 by default ref . It's good to specify the minimum target version so that we will not have lint/format errors targeting 3.9.

I confirmed recent CI runs with Ruff version 0.9.10 and it seems existing pytest codes have format errors.
https://github.com/spotify/pedalboard/actions/runs/13666616245/job/38209420452?pr=403

Changes

1. Add --target-version option to ruff format and ruff check commands.

      --target-version <TARGET_VERSION>
          The minimum Python version that should be supported
          
          [possible values: py37, py38, py39, py310, py311, py312, py313]

ruff command help

root@cd4bc9e7aab4:/workspaces/pedalboard# ruff --version
ruff 0.9.10
root@cd4bc9e7aab4:/workspaces/pedalboard# ruff format --help
Run the Ruff formatter on the given files or directories

Usage: ruff format [OPTIONS] [FILES]...

Arguments:
  [FILES]...
          List of files or directories to format [default: .]

Options:
      --check
          Avoid writing any formatted files back; instead, exit with a non-zero status code if any files would have been modified, and zero otherwise

      --diff
          Avoid writing any formatted files back; instead, exit with a non-zero status code and the difference between the current file and how the formatted file would look like

      --extension <EXTENSION>
          List of mappings from file extension to language (one of `python`, `ipynb`, `pyi`). For example, to treat `.ipy` files as IPython notebooks, use `--extension ipy:ipynb`

      --target-version <TARGET_VERSION>
          The minimum Python version that should be supported
          
          [possible values: py37, py38, py39, py310, py311, py312, py313]

      --preview
          Enable preview mode; enables unstable formatting. Use `--no-preview` to disable

  -h, --help
          Print help (see a summary with '-h')

Miscellaneous:
  -n, --no-cache
          Disable cache reads
          
          [env: RUFF_NO_CACHE=]

      --cache-dir <CACHE_DIR>
          Path to the cache directory
          
          [env: RUFF_CACHE_DIR=]

      --stdin-filename <STDIN_FILENAME>
          The name of the file when passing it through stdin

File selection:
      --respect-gitignore
          Respect file exclusions via `.gitignore` and other standard ignore files. Use `--no-respect-gitignore` to disable

      --exclude <FILE_PATTERN>
          List of paths, used to omit files and/or directories from analysis

      --force-exclude
          Enforce exclusions, even for paths passed to Ruff directly on the command-line. Use `--no-force-exclude` to disable

Format configuration:
      --line-length <LINE_LENGTH>
          Set the line-length

Editor options:
      --range <RANGE>
          When specified, Ruff will try to only format the code in the given range.
          It might be necessary to extend the start backwards or the end forwards, to fully enclose a logical line.
          The `<RANGE>` uses the format `<start_line>:<start_column>-<end_line>:<end_column>`.
          
          - The line and column numbers are 1 based.
          - The column specifies the nth-unicode codepoint on that line.
          - The end offset is exclusive.
          - The column numbers are optional. You can write `--range=1-2` instead of `--range=1:1-2:1`.
          - The end position is optional. You can write `--range=2` to format the entire document starting from the second line.
          - The start position is optional. You can write `--range=-3` to format the first three lines of the document.
          
          The option can only be used when formatting a single file. Range formatting of notebooks is unsupported.

Log levels:
  -v, --verbose
          Enable verbose logging

  -q, --quiet
          Print diagnostics, but nothing else

  -s, --silent
          Disable all logging (but still exit with status code "1" upon detecting diagnostics)

Global options:
      --config <CONFIG_OPTION>
          Either a path to a TOML configuration file (`pyproject.toml` or `ruff.toml`), or a TOML `<KEY> = <VALUE>` pair (such as you might find in a `ruff.toml` configuration file) overriding a specific configuration option. Overrides of
          individual settings using this option always take precedence over all configuration files, including configuration files that were also specified using `--config`

      --isolated
          Ignore all configuration files
root@cd4bc9e7aab4:/workspaces/pedalboard# ruff check --help
Run Ruff on the given files or directories

Usage: ruff check [OPTIONS] [FILES]...

Arguments:
  [FILES]...  List of files or directories to check [default: .]

Options:
      --fix                              Apply fixes to resolve lint violations. Use `--no-fix` to disable or `--unsafe-fixes` to include unsafe fixes
      --unsafe-fixes                     Include fixes that may not retain the original intent of the code. Use `--no-unsafe-fixes` to disable
      --show-fixes                       Show an enumeration of all fixed lint violations. Use `--no-show-fixes` to disable
      --diff                             Avoid writing any fixed files back; instead, output a diff for each changed file to stdout, and exit 0 if there are no diffs. Implies `--fix-only`
  -w, --watch                            Run in watch mode by re-running whenever files change
      --fix-only                         Apply fixes to resolve lint violations, but don't report on, or exit non-zero for, leftover violations. Implies `--fix`. Use `--no-fix-only` to disable or `--unsafe-fixes` to include unsafe fixes
      --ignore-noqa                      Ignore any `# noqa` comments
      --output-format <OUTPUT_FORMAT>    Output serialization format for violations. The default serialization format is "full" [env: RUFF_OUTPUT_FORMAT=] [possible values: concise, full, json, json-lines, junit, grouped, github, gitlab, pylint,
                                         rdjson, azure, sarif]
  -o, --output-file <OUTPUT_FILE>        Specify file to write the linter output to (default: stdout) [env: RUFF_OUTPUT_FILE=]
      --target-version <TARGET_VERSION>  The minimum Python version that should be supported [possible values: py37, py38, py39, py310, py311, py312, py313]
      --preview                          Enable preview mode; checks will include unstable rules and fixes. Use `--no-preview` to disable
      --extension <EXTENSION>            List of mappings from file extension to language (one of `python`, `ipynb`, `pyi`). For example, to treat `.ipy` files as IPython notebooks, use `--extension ipy:ipynb`
      --statistics                       Show counts for every rule with at least one violation
      --add-noqa                         Enable automatic additions of `noqa` directives to failing lines
      --show-files                       See the files Ruff will be run against with the current settings
      --show-settings                    See the settings Ruff will use to lint a given Python file
  -h, --help                             Print help

Rule selection:
      --select <RULE_CODE>                                 Comma-separated list of rule codes to enable (or ALL, to enable all rules)
      --ignore <RULE_CODE>                                 Comma-separated list of rule codes to disable
      --extend-select <RULE_CODE>                          Like --select, but adds additional rule codes on top of those already specified
      --per-file-ignores <PER_FILE_IGNORES>                List of mappings from file pattern to code to exclude
      --extend-per-file-ignores <EXTEND_PER_FILE_IGNORES>  Like `--per-file-ignores`, but adds additional ignores on top of those already specified
      --fixable <RULE_CODE>                                List of rule codes to treat as eligible for fix. Only applicable when fix itself is enabled (e.g., via `--fix`)
      --unfixable <RULE_CODE>                              List of rule codes to treat as ineligible for fix. Only applicable when fix itself is enabled (e.g., via `--fix`)
      --extend-fixable <RULE_CODE>                         Like --fixable, but adds additional rule codes on top of those already specified

File selection:
      --exclude <FILE_PATTERN>         List of paths, used to omit files and/or directories from analysis
      --extend-exclude <FILE_PATTERN>  Like --exclude, but adds additional files and directories on top of those already excluded
      --respect-gitignore              Respect file exclusions via `.gitignore` and other standard ignore files. Use `--no-respect-gitignore` to disable
      --force-exclude                  Enforce exclusions, even for paths passed to Ruff directly on the command-line. Use `--no-force-exclude` to disable

Miscellaneous:
  -n, --no-cache                         Disable cache reads [env: RUFF_NO_CACHE=]
      --cache-dir <CACHE_DIR>            Path to the cache directory [env: RUFF_CACHE_DIR=]
      --stdin-filename <STDIN_FILENAME>  The name of the file when passing it through stdin
  -e, --exit-zero                        Exit with status code "0", even upon detecting lint violations
      --exit-non-zero-on-fix             Exit with a non-zero status code if any files were modified via fix, even if no lint violations remain

Log levels:
  -v, --verbose  Enable verbose logging
  -q, --quiet    Print diagnostics, but nothing else
  -s, --silent   Disable all logging (but still exit with status code "1" upon detecting diagnostics)

Global options:
      --config <CONFIG_OPTION>  Either a path to a TOML configuration file (`pyproject.toml` or `ruff.toml`), or a TOML `<KEY> = <VALUE>` pair (such as you might find in a `ruff.toml` configuration file) overriding a specific configuration option.
                                Overrides of individual settings using this option always take precedence over all configuration files, including configuration files that were also specified using `--config`
      --isolated                Ignore all configuration files

2. Fix ruff format errors by adding target-version options.

Refs

Ruff 0.9.10 code related to default python-version:

• https://github.com/astral-sh/ruff/blob/0.9.10/crates/ruff_linter/src/settings/types.rs#L39-L44
• https://github.com/astral-sh/ruff/blob/0.9.10/crates/ruff_python_ast/src/python_version.rs#L67-L71

It seems from 0.8.0, it's changed to use py39 ref
0.8.0 release Nov 22, 2024