Add modifiers to containsString, hasPrefix, hasSuffix

[cbaker6]

Non-breaking change...

• add the ability to use modifiers
• reduce the matchesRegex method to 1 instead of 2
• documentation updates
• fixed an incorrect link in the CHANGELOG
• changed codecov patch back to auto
• add entry to changeling

[codecov]

Codecov Report

Merging #85 (cd5be71) into main (8bab749) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #85   +/-   ##
=======================================
  Coverage   78.73%   78.73%           
=======================================
  Files          63       63           
  Lines        5040     5041    +1     
=======================================
+ Hits         3968     3969    +1     
  Misses       1072     1072           

Impacted Files	Coverage Δ
Sources/ParseSwift/Types/Query.swift	90.60% <100.00%> (+0.02%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8bab749...cd5be71. Read the comment docs.