Rename DefaultNoConstraint to SimpleConstraint

[lucas34]

No description provided.

[github-actions]

	1 Warning
⚠️	The library files were changed, but the tests remained unmodified. Consider updating or adding to the tests to match the library changes.

Generated by 🚫 Danger

[github-actions]

	1 Warning
⚠️	The library files were changed, but the tests remained unmodified. Consider updating or adding to the tests to match the library changes.

Generated by 🚫 Danger

[codecov]

Codecov Report

Merging #313 into master will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #313      +/-   ##
==========================================
- Coverage   92.63%   92.58%   -0.06%     
==========================================
  Files          29       29              
  Lines        1874     1861      -13     
==========================================
- Hits         1736     1723      -13     
  Misses        138      138              

Impacted Files	Coverage Δ
Sources/SwiftQueue/Constraint+Network.swift	63.33% <ø> (ø)
Sources/SwiftQueue/Constraint.swift	100.00% <ø> (ø)
Sources/SwiftQueue/Constraint+Delay.swift	100.00% <100.00%> (ø)
Sources/SwiftQueue/Constraint+Timeout.swift	100.00% <100.00%> (ø)
Sources/SwiftQueue/Constraint+UniqueUUID.swift	100.00% <100.00%> (ø)