Refactor Network constraint

[lucas34]

Breaking Changes

• .internet(atLeast: .any) is forbidden. It's already default behaviour
• Cannot use internet constraint if Operation are running in main thread

[codecov]

Codecov Report

Merging #329 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #329      +/-   ##
==========================================
+ Coverage   87.80%   87.81%   +0.01%     
==========================================
  Files          36       36              
  Lines        1812     1806       -6     
==========================================
- Hits         1591     1586       -5     
+ Misses        221      220       -1     

Impacted Files	Coverage Δ
Tests/SwiftQueueTests/LoggerTests.swift	100.00% <ø> (ø)
Tests/SwiftQueueTests/SwiftQueueBuilderTests.swift	100.00% <ø> (ø)
Tests/SwiftQueueTests/SwiftQueueManagerTests.swift	100.00% <ø> (ø)
Sources/SwiftQueue/Constraint+Network.swift	66.66% <100.00%> (+3.33%)	⬆️
Sources/SwiftQueue/JobBuilder.swift	90.66% <100.00%> (+0.12%)	⬆️
Sources/SwiftQueue/JobInfo.swift	100.00% <100.00%> (ø)