Deprecate Attribute

[bbatsche]

Deprecate calls to "attribute" assertions and replace with "property" (where applicable) Other fixes and cleanup for PHPUnit 10 compatibility Update dev support files

[bbatsche]

Resolves issue #98

[codecov[bot]]

Codecov Report

Merging #98 (005f96e) into master (e7ea637) will decrease coverage by 0.29%. The diff coverage is 83.48%.

@@             Coverage Diff              @@
##             master      #98      +/-   ##
============================================
- Coverage     94.94%   94.66%   -0.29%     
- Complexity      239      257      +18     
============================================
  Files             9       10       +1     
  Lines           534      618      +84     
============================================
+ Hits            507      585      +78     
- Misses           27       33       +6     

Files Changed	Coverage Δ
src/API/File.php	97.64% <ø> (+0.21%)	:arrow_up:
src/API/Method.php	100.00% <ø> (ø)
src/API/Assert.php	41.66% <41.66%> (ø)
src/Constraint/Factory.php	92.02% <80.95%> (+4.02%)	:arrow_up:
src/API/Value.php	92.99% <85.00%> (-0.63%)	:arrow_down:
src/API/Base.php	100.00% <100.00%> (+1.08%)	:arrow_up:
src/API/Property.php	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

[bbatsche]

Coverage hit is negligible, merging anyway