Update year

Update contributing info

Update CHANGELOG and history

Bump version to 4.3.1

Merge branch 'master' of https://github.com/mmistakes/minimal-mistakes

Merge branch 'release/4.3.1' into develop

Merge branch 'release/4.3.1'

Bump version to 4.3.1

Update CHANGELOG

Remove buggy conditional around related posts header (#901)

This removes a buggy conditional that checks if `related_label` is
available in translations before displaying the header for related
posts but this header already handle missing translation by using a
default string.

With this fix the header is displayed even if the translation for this
label isn't available.

Fix #900

Merge branch 'release/4.3.0' into develop

Merge branch 'release/4.3.0'

Bump version to 4.3.0

Update CHANGELOG and history

Add banner text to main.min.js (#880)

- Add `---` YAML Front Matter as a workaround to allow the theme gem's version to be overridden locally.
- Adjust page scope in Front Matter default to avoid adding a layout to `main.min.js`
- Fixes #874, Fixes #722

Change default locale to `en_US` to appease OpenGraph debugger.
- Fixes #843

Merge branch 'release/4.2.2' into develop

Merge branch 'release/4.2.2'

Update theme meta info

Bump version to 4.2.2