1.4.0-beta3

• fix URI error #163
• modernize database widget
• improved tests

What's Changed

• Update pre-commit requirement from <2.11,>=2.7 to >=2.7,<2.12 in /requirements by @dependabot in #143
• Update flake8 requirement from <3.9,>=3.8 to >=3.8,<3.10 in /requirements by @dependabot in #142
• Bump sphinx-autobuild from 2020.9.1 to 2021.3.14 in /requirements by @dependabot in #139
• Bump furo from 2021.2.28b28 to 2021.3.20b30 in /requirements by @dependabot in #141
• Update ghp-import requirement from <1.1,>=1.0 to >=1.0,<1.2 in /requirements by @dependabot in #140
• Improve isort by @Guts in #144
• Settings UI and logic by @Guts in #138
• Switch to absolute imports to fix side-effects by @Guts in #145
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #146
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #147
• Bump furo from 2021.3.20b30 to 2021.4.11b34 in /requirements by @dependabot in #150
• Bump actions/cache from v2.1.4 to v2.1.5 by @dependabot in #151
• Update pre-commit requirement from <2.12,>=2.7 to >=2.7,<2.13 in /requirements by @dependabot in #148
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #159
• Make custom viewers more robust by @Guts in #161
• Road to unit tests by @Guts in #160
• Complete and improve settings management by @Guts in #165
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #170
• Bump codecov/codecov-action from 1 to 2.0.2 by @dependabot in #172
• Bump furo from 2021.6.24b37 to 2021.7.31b41 in /requirements by @dependabot in #171
• Improve database connections management by @Guts in #169

Full Changelog: 1.3.1...1.4.0-beta3