PHPstan level 2

[JeroenVanOort]

There was no other way to make this happen than to make a custom PHPStan extension.

[codecov[bot]]

Codecov Report

Merging #498 into master will increase coverage by 0.35%. The diff coverage is 97.93%.

@@             Coverage Diff              @@
##             master     #498      +/-   ##
============================================
+ Coverage     98.33%   98.68%   +0.35%     
- Complexity     1757     1760       +3     
============================================
  Files            67       66       -1     
  Lines          4328     4272      -56     
============================================
- Hits           4256     4216      -40     
+ Misses           72       56      -16

Impacted Files	Coverage Δ	Complexity Δ
lib/Parameter.php	99.2% <ø> (-0.01%)	81 <0> (ø)
lib/Recur/RDateIterator.php	96.87% <ø> (ø)	14 <0> (ø)	:arrow_down:
lib/Node.php	100% <ø> (ø)	10 <0> (ø)	:arrow_down:
lib/BirthdayCalendarGenerator.php	98.07% <ø> (ø)	18 <0> (ø)	:arrow_down:
lib/Parser/XML/Element/KeyValue.php	84.61% <ø> (ø)	4 <0> (ø)	:arrow_down:
lib/VCardConverter.php	98.92% <ø> (ø)	72 <0> (ø)	:arrow_down:
lib/Recur/EventIterator.php	100% <ø> (ø)	46 <0> (ø)	:arrow_down:
lib/Property/ICalendar/DateTime.php	100% <ø> (ø)	44 <0> (ø)	:arrow_down:
lib/Document.php	100% <100%> (ø)	24 <0> (ø)	:arrow_down:
lib/Component/VCard.php	100% <100%> (ø)	53 <0> (ø)	:arrow_down:
... and 30 more

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[phil-davis]

@JeroenVanOort I merged PR #500 that "standardizes" more CI stuff. Sorry, now you have conflicts. Please rebase and resolve...

[phil-davis]

@JeroenVanOort this has been sitting for a while and now has conflicts. Are you able to rebase and resolve them again?