Add java arrays basic support

[anotender]

Fixes #166

[codecov]

Codecov Report

Merging #171 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##             master    #171      +/-   ##
===========================================
+ Coverage     68.88%   68.9%   +0.02%     
- Complexity      521     522       +1     
===========================================
  Files            33      33              
  Lines          2619    2621       +2     
  Branches        431     432       +1     
===========================================
+ Hits           1804    1806       +2     
  Misses          644     644              
  Partials        171     171

Impacted Files	Coverage Δ	Complexity Δ
...jpa/query/schema/impl/GraphQLJpaSchemaBuilder.java	89.08% <100%> (+0.03%)	130 <0> (+1)	⬆️

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[igdianov]

@anotender LGTM Thank you!