Coding standard 2.0.0

[phil-davis]

like done in core owncloud/core#36580

and apply latest drone starlark code changes
Note: there was no effect here on .drone.yml

Note: there were no changes to PHP code needed for this app to pass code-style 2.0.0

[codecov]

Codecov Report

Merging #306 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##             master    #306   +/-   ##
========================================
  Coverage      4.46%   4.46%           
  Complexity      306     306           
========================================
  Files            14      14           
  Lines          1188    1188           
========================================
  Hits             53      53           
  Misses         1135    1135

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0cb0404...eabf3f3. Read the comment docs.