Updated CHANGELOG

Updated go version.

Merge pull request #173 from janpfeifer/plotly

Plotly: updated to newest version and added some pre-defined themes.

Bumped version of Go compiler in dockerfile.

Merge pull request #161 from janpfeifer/refactor

v0.10.11

Updated CHANGELOG. Skipped 0.10.9.

Updated CHANGELOG. Skipped 0.10.9.

Fixed go.mod versions.

Updated CHANGELOG

Updated coverage.