Enhanced Query API

[JPDSousa]

Closes #27

Smof now supports multiple MongoDB query operators such as:

• Evaluation operators (eq; ne; gt; gte; lt; lte; in; nin)
• Logical operators (and; or; nor; not)
• Evaluation operators (mod; regex)
• Array operators

Other operators are available but are considered relevant enough for this stage

[codecov-io]

Codecov Report

Merging #33 into master will decrease coverage by 1.51%.
The diff coverage is 63.15%.

@@             Coverage Diff              @@
##             master      #33      +/-   ##
============================================
- Coverage     78.82%   77.31%   -1.52%     
- Complexity      634      638       +4     
============================================
  Files            66       68       +2     
  Lines          1757     1816      +59     
  Branches        167      168       +1     
============================================
+ Hits           1385     1404      +19     
- Misses          248      285      +37     
- Partials        124      127       +3

Impacted Files	Coverage Δ	Complexity Δ
src/org/smof/parsers/SmofParser.java	74.19% <ø> (ø)	23 <0> (ø)	⬇️
src/org/smof/collection/Smof.java	74.32% <ø> (ø)	19 <0> (ø)	⬇️
src/org/smof/collection/SmofUpdate.java	65.21% <ø> (ø)	9 <0> (ø)	⬇️
src/org/smof/collection/DocumentQuery.java	0% <0%> (ø)	0 <0> (?)
src/org/smof/collection/ArrayQuery.java	100% <100%> (ø)	3 <3> (?)
src/org/smof/collection/SmofCollectionImpl.java	86.95% <100%> (ø)	26 <1> (ø)	⬇️
src/org/smof/collection/QueryOperators.java	100% <100%> (ø)	5 <5> (?)
src/org/smof/parsers/ArrayParser.java	62.74% <100%> (-3.33%)	16 <3> (-2)
src/org/smof/collection/UpdateOperators.java	100% <100%> (ø)	3 <1> (?)
src/org/smof/collection/AbstractQuery.java	32.6% <32.6%> (ø)	10 <10> (?)
... and 8 more

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