Update rich requirement from ~=9.10.0 to ~=9.12.3

[dependabot[bot]]

Updates the requirements on rich to permit the latest version.

Release notes

Sourced from rich's releases.

Faster tables

A optimization to the Padding class. This is unlikely to impact anyone unless you are printing very large tables.

[9.12.3] - 2021-02-28

Changed

• Optimized Padding

Changelog

Sourced from rich's changelog.

[9.12.3] - 2021-02-28

Changed

• Optimized Padding

[9.12.2] - 2021-02-27

Added

• Added ConsoleOptions.copy

Changed

• Optimized ConsoleOptions.update

[9.12.1] - 2021-02-27

### Fixed

• Fixed deadlock in Progress willmcgugan/rich#1061

Added

• Added Task.finished_speed

Changed

• Froze TransferSpeedColumn speed when task is finished
• Added SIGINT handler to downloader.py example
• Optimization for large tables

[9.12.0] - 2021-02-24

Fixed

• Fixed issue with Syntax and missing lines in Layout willmcgugan/rich#1050
• Fixed issue with nested markdown elements willmcgugan/rich#1036
• Fixed new lines not invoking render hooks willmcgugan/rich#1052
• Fixed Align setting height to child willmcgugan/rich#1057

Changed

• Printing a table with no columns now result in a blank line willmcgugan/rich#1044

Added

• Added height to Panel

[9.11.1] - 2021-02-20

... (truncated)

Commits

• ea2ed33 Merge pull request #1073 from willmcgugan/padding-optimization
• ba4e51e version bump
• 6219973 test fixes
• fa25b28 further optimizations
• 330ef6d simplify
• f6d6f73 optimized padding
• 43a26c0 Merge pull request #1071 from willmcgugan/options-optimize
• 545f9b2 optimized options
• 64755d4 Merge pull request #1070 from willmcgugan/fixed-9.12.1
• 446cc0d version bump
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot[bot]]

Superseded by #80.