[Monthly release] v0.4.16

* [Montly release] v0.4.16

* Major version bumps

* Update major version on README for ubuntu images

* Undo major version bump for cpp

* Bump versions

* Bump versions again

* Update images

* Normalise version numbers

[Monthly release] v0.4.12 (devcontainers#1398)

* initial release

* minor version bump for ruby and dotnet

Fix nesting of settings (devcontainers#1380)

Update features and add custom instructions (devcontainers#1379)

Increment versions (devcontainers#1369)

[Monthly release] v0.4.11 (devcontainers#1339)

* prep release

* bump minor version for all images with language updates

[Monthly release] v0.4.10 (devcontainers#1250)

* incremented patch version for images

* minor version bump anaconda image instead

[Monthly release] v0.4.8 (devcontainers#1214)

Images release v0.4.7 (devcontainers#1199)

Release v0.4.6 (devcontainers#1195)