Add additional methods to EnumSelector

[ExE-Boss]

This PR adds additional methods to EnumSelector.

To do list:

• [x] Add size() method

New Features:

• apart(Iterable<T>) for passing collections.
• apart(T, T) to allow passing as a method reference to BiFunction<T, T, EnumSelector<T>> and BiConsumer<T, T>.
• apart(T...) var-args method, replaces apart(T, T...)

Changes:

• toString() now returns the same result as toSet().toString().
• equals() now returns true when this.toSet().equals(other.toSet()).
• hashCode() now returns a consistent value calculated from this.toSet().

Bug Fixes:

• blocksAll() would return false when allowAll().apart(EnumExample.values()) was called.
• allowsAll() would return false when blockAll().apart(EnumExample.values()) was called.

[codecov-io]

Codecov Report

Merging #286 into master will increase coverage by 0.19%. The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #286      +/-   ##
============================================
+ Coverage     13.23%   13.43%   +0.19%     
- Complexity      684      704      +20     
============================================
  Files           405      405              
  Lines         12198    12226      +28     
  Branches       1288     1294       +6     
============================================
+ Hits           1615     1643      +28     
  Misses        10482    10482              
  Partials        101      101

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/nova/core/util/EnumSelector.java	100% <100%> (ø)	52 <17> (+20)	:arrow_up:

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