Bump version for new release

[LKedward]

Based on #399, I've bumped the version to 0.3.0. See below for draft release notes.

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Changes:

• Add check for duplicate module names (not allowed) (Fix for Issue #396 - Duplicate module definitions #412)

• Add support for detecting FreeBSD (Identify OpenBSD. #468)

• Exit more gracefully with useful error messages for build,run,test (Catch execute_command_line errors and print useful messages #491)

New features:

• Add external-modules manifest field to allow using installed library modules (Add: external-modules key to build table for non-fpm modules #438)

• Add -C/--directory flag to change working directory (Allow fpm to change the working directory #483)

• Add automatic discovery of manifest files in parent directories (Allow fpm to change the working directory #483)

• Add simple support for invoking plugins from fpm (alpha plugins, take III #484)

• Add support for specifying command line inputs via response files

• Add support for reading package version from file (Allow reading version number from file #500)

Fixes:

• Fix default flags for Intel fortran on Windows (Use different compiler flags on different platforms for Intel #431)

• Remove -coarray=single flag from default Intel flags (Remove: coarray single from default Intel flags. #437)

• Allow using the lib archiver in Windows (Use lib instead of ar on Windows #442)

• Invoke matching c compiler when compiling c code (Fix to allow compiling C with Intel CC #433)

• Fix spurious output when checking for archiver (Redirect output when searching for archiver #489)

• Fix to module statement parsing (Fix module parsing #490)

• Fix for specifying compiler flags containing an equals(=) sign (correct for equal sign in flag options to fix #495 #497)

[awvwgk]

Looks good to me

[LKedward]

Cheers 👍

[awvwgk]

I added the single file version and updated the conda-forge release (rollout in the CDN will be done in two hours). Will check my homebrew tap and the MSYS2 packaging later this week.