Support query exclude keys

[dplewis]

parse-community/parse-server#5737

[codecov]

Codecov Report

Merging #445 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #445      +/-   ##
============================================
+ Coverage     96.94%   96.95%   +0.01%     
- Complexity     1044     1048       +4     
============================================
  Files            39       39              
  Lines          2910     2920      +10     
============================================
+ Hits           2821     2831      +10     
  Misses           89       89

Impacted Files	Coverage Δ	Complexity Δ
src/Parse/ParseQuery.php	99.73% <100%> (ø)	115 <2> (+4)	⬆️

---

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 3dde2a3...4f76810. Read the comment docs.