Enhancement: Synchronize with ergebnis/php-library-template

[localheinz]

This PR

• synchronizes with ergebnis/php-library-template

[codecov]

Codecov Report

Merging #217 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             master   #217   +/-   ##
=======================================
  Coverage       100%   100%           
  Complexity      147    147           
=======================================
  Files            33     33           
  Lines           472    472           
=======================================
  Hits            472    472

Impacted Files	Coverage Δ	Complexity Δ
...rc/Vendor/Composer/VersionConstraintNormalizer.php	100% <ø> (ø)	7 <0> (ø)	⬇️
src/NoFinalNewLineNormalizer.php	100% <ø> (ø)	1 <0> (ø)	⬇️
src/Format/NewLine.php	100% <ø> (ø)	6 <0> (ø)	⬇️
src/Exception/InvalidNewLineStringException.php	100% <ø> (ø)	2 <0> (ø)	⬇️
...Exception/SchemaUriCouldNotBeResolvedException.php	100% <ø> (ø)	2 <0> (ø)	⬇️
...chemaUriReferencesInvalidJsonDocumentException.php	100% <ø> (ø)	2 <0> (ø)	⬇️
src/Exception/InvalidIndentStyleException.php	100% <ø> (ø)	3 <0> (ø)	⬇️
...eferencesDocumentWithInvalidMediaTypeException.php	100% <ø> (ø)	2 <0> (ø)	⬇️
src/Exception/InvalidIndentStringException.php	100% <ø> (ø)	2 <0> (ø)	⬇️
src/Json.php	100% <ø> (ø)	9 <0> (ø)	⬇️
... and 23 more

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