Update dependencies (git-town#2637)

Fix broken version number in release binaries (git-town#2333)

Update major release instructions

Fix release script

Fix Windows release script

v7.9.0 (git-town#2031)

Remove unnecessary feature spec (git-town#1953)

v7.8.0 (git-town#1888)

Ignore changes in submodules (git-town#1744)