fix: commit-lint config to ignore dependable-bot commits

[the-robot]

Context

So actually dependable-bot from GitHub does not follow the git conventional commits. The commit-lint will fail when the dependable-bot creates a commit that has more than 100 characters in the commit message body.

We can take a look at this issue on the dependable bot.

Approach

The issue can be solved by updating the commit-lint configuration with a regex that will ignore dependable bot commits.

So one pattern with a dependable bot is that it will start to commit message with Bumps follow by a markdown link [package-name](package-URL). So the regex is created as below to ignore the following pattern.

^Bumps \[(.+)\]\((.+)\)(.*).$

Tests

You can test by creating commits that do not follow conventional git commits.

1. commit with no prefix (feat:, fix:) -- failure
2. commit with a message body of more than 100 characters -- failure
3. commit with a message body of more than 100 characters and following dependable-bot format -- success

[LoneRifle]

Not actually needed - dependabot commits to this repo actually follow conventional commits (see changelog for this repo). Or am I mistaken?

[the-robot]

We have encountered an issue where the dependable bot upgrade a package, and wrote a description in the commit body, longer than 100 characters. It results in commit-message linting failure.

The error message and commit body content are added for reference.

Body message

Bumps [semver-regex](https://github.com/sindresorhus/semver-regex) and [husky](https://github.com/typicode/husky). These dependencies needed to be updated together.

Updates `semver-regex` from 2.0.0 to 3.1.4
- [Release notes](https://github.com/sindresorhus/semver-regex/releases)
- [Commits](https://github.com/sindresorhus/semver-regex/compare/v2.0.0...v3.1.4)

Updates `husky` from 4.2.5 to 4.3.8
- [Release notes](https://github.com/typicode/husky/releases)
- [Commits](https://github.com/typicode/husky/compare/v4.2.5...v4.3.8)

---
updated-dependencies:
- dependency-name: semver-regex
  dependency-type: indirect
- dependency-name: husky
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Linting error

✖   body's lines must not be longer than 100 characters [body-max-line-length]

[LoneRifle]

Okay, but that's still not the commit message format that dependabot uses. See eg a8afdcd

[LoneRifle]

Oh, never mind, I just noticed that the regex is a //m. lgtm, hope this works