Standardize CI

[phil-davis]

Issue #54

• standardize Makefile .drone.yml etc
• add coding standard. phan and phpstan to Makefile and drone scripts
• apply coding standard changes and add coding standard tests to drone matrix
• split API acceptance tests in to 2 suites (because a single suite was taking about 35 minutes to finish, a bit too long)

[codecov]

Codecov Report

Merging #60 into master will increase coverage by <.01%.
The diff coverage is 0%.

@@             Coverage Diff             @@
##             master     #60      +/-   ##
===========================================
+ Coverage         2%   2.01%   +<.01%     
  Complexity      214     214              
===========================================
  Files            22      22              
  Lines           998     995       -3     
===========================================
  Hits             20      20              
+ Misses          978     975       -3

Impacted Files	Coverage Δ	Complexity Δ
lib/adminpanel.php	0% <ø> (ø)	3 <0> (ø)	⬇️
command/reset.php	0% <ø> (ø)	2 <0> (ø)	⬇️
add.php	0% <0%> (ø)	0 <0> (ø)	⬇️
jobs/updatemetadata.php	0% <0%> (ø)	9 <9> (ø)	⬇️
command/index.php	0% <0%> (ø)	10 <0> (ø)	⬇️
db/statusmapper.php	0% <0%> (ø)	35 <12> (ø)	⬇️
search/elasticsearchprovider.php	0% <0%> (ø)	16 <5> (ø)	⬇️
controller/adminsettingscontroller.php	34.48% <0%> (ø)	10 <0> (ø)	⬇️
appinfo/app.php	0% <0%> (ø)	0 <0> (ø)	⬇️
appinfo/routes.php	0% <0%> (ø)	0 <0> (ø)	⬇️
... and 9 more

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[phil-davis]

I scored 0% codecov of the patch diff - it thinks none of lines auto-changed by php-cs-fixer are covered by unit tests. Project code coverage of this app is only 2% - seems a bit low.