Version 7

Merge pull request oh-my-fish#564 from oh-my-fish/release

Update changelog for v6

Merge pull request oh-my-fish#488 from oh-my-fish/prepare-release-5

Update release date

oops (oh-my-fish#470)

Add release versions to changelog (oh-my-fish#424)

Search Function (oh-my-fish#314)

Add new search command