0.7.7

This is a patch release.

Bugs fixed:

• make sure file generated by docker-gen have the right permissions (#352, adapted from original PR #308)
• #355 fix container ID extraction from /proc/self/mountinfo file (#356)

Changes since 0.7.6:

• the contains template function can now take maps from string to any type (#343)

Various doc updates (#313 #348)

The test suite has been updated and the CI now runs correctly again after moving from Travis CI to GitHub Actions (4c53a86)