Adding start to the Publisher

[TAlonglong]

Add start to the Publisher due to updates in posttroll version 1.10.0

• [X ] Closes Publisher need to call start method as of version 1.10.0 of posttroll #171
• Tests added
• Fully documented
• Add your name to AUTHORS.md if not there already

[codecov]

Codecov Report

Merging #172 (a72712c) into main (47dd25f) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #172   +/-   ##
=======================================
  Coverage   90.00%   90.00%           
=======================================
  Files          24       24           
  Lines        5100     5100           
=======================================
  Hits         4590     4590           
  Misses        510      510           

Flag	Coverage Δ
unittests	90.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
trollmoves/move_it_base.py	79.80% <100.00%> (ø)

[pnuu]

LGTM (well, I came up with the fix 😅)