Add php-cs-fixer

[sualko]

fix #43

[codecov]

Codecov Report

Merging #46 into master will increase coverage by 0.4%.
The diff coverage is 61.24%.

@@           Coverage Diff            @@
##             master   #46     +/-   ##
========================================
+ Coverage     69.59%   70%   +0.4%     
  Complexity      229   229             
========================================
  Files            27    27             
  Lines           786   800     +14     
========================================
+ Hits            547   560     +13     
- Misses          239   240      +1

Impacted Files	Coverage Δ	Complexity Δ
lib/Settings/Admin.php	0% <0%> (ø)	5 <5> (ø)	⬇️
lib/RawRequest.php	0% <0%> (ø)	1 <1> (ø)	⬇️
lib/rosterpush.php	0% <0%> (ø)	7 <7> (ø)	⬇️
lib/command/refreshroster.php	0% <0%> (ø)	4 <4> (ø)	⬇️
lib/hooks.php	0% <0%> (ø)	9 <9> (ø)	⬇️
lib/stanzalogger.php	0% <0%> (ø)	4 <4> (ø)	⬇️
lib/Settings/Section.php	0% <0%> (ø)	5 <5> (ø)	⬇️
lib/db/iqrosterpush.php	0% <0%> (ø)	1 <1> (ø)	⬇️
lib/dblock.php	100% <100%> (ø)	3 <3> (ø)	⬇️
lib/TimeLimitedToken.php	100% <100%> (ø)	6 <6> (ø)	⬇️
... and 18 more

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[LEDfan]

Nice! Is there are reason why the 'braces' => ['position_after_functions_and_oop_constructs' => 'same'], was not included? I personally prefer that style and Nextcloud is using it too (nextcloud/server@c36da2c#diff-8b6c0c683d533f32b31ce28cee1bd3e6R15)

[sualko]

I know, but it throw an error and a short search showed that this is now handled by the PSR2 rule.