Expand documentation factory with new fields.

[mattcoley]

The new required and input attributes were not being added to the documentation factory builder. This fixes that.

[codecov-io]

Codecov Report

Merging #309 into master will decrease coverage by 0.05%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##             master     #309      +/-   ##
============================================
- Coverage     71.58%   71.52%   -0.06%     
  Complexity     1553     1553              
============================================
  Files           239      239              
  Lines          4863     4867       +4     
  Branches        787      787              
============================================
  Hits           3481     3481              
- Misses         1097     1101       +4     
  Partials        285      285

Impacted Files	Coverage Δ	Complexity Δ
...ava/com/hubspot/jinjava/doc/JinjavaDocFactory.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...n/java/com/hubspot/jinjava/doc/JinjavaDocItem.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...ava/com/hubspot/jinjava/doc/JinjavaDocExpTest.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...java/com/hubspot/jinjava/doc/JinjavaDocFilter.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...in/java/com/hubspot/jinjava/doc/JinjavaDocTag.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...va/com/hubspot/jinjava/doc/JinjavaDocFunction.java	0% <0%> (ø)	0 <0> (ø)	⬇️
.../java/com/hubspot/jinjava/doc/JinjavaDocParam.java	0% <0%> (ø)	0 <0> (ø)	⬇️

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