Enhancement: Synchronize with ergebnis/php-library-template

[localheinz]

This PR

• synchronizes with ergebnis/php-library-template

[codecov]

Codecov Report

Merging #125 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #125   +/-   ##
=========================================
  Coverage     98.55%   98.55%           
  Complexity       48       48           
=========================================
  Files             6        6           
  Lines           138      138           
=========================================
  Hits            136      136           
  Misses            2        2

Impacted Files	Coverage Δ	Complexity Δ
src/Exception/DirectoryDoesNotExist.php	100% <ø> (ø)	2 <0> (ø)	⬇️
src/Exception/ShouldNotHappen.php	100% <ø> (ø)	1 <0> (ø)	⬇️
src/Exception/MultipleDefinitionsFound.php	100% <ø> (ø)	2 <0> (ø)	⬇️
src/Construct.php	100% <ø> (ø)	7 <0> (ø)	⬇️
src/Constructs.php	97.77% <ø> (ø)	34 <0> (ø)	⬇️
src/Exception/ParseError.php	100% <ø> (ø)	2 <0> (ø)	⬇️

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