feat: update config settings for subscriptions

[smyrick]

To prepare for subscriptions, I moved the order of the parameters in toSchema() so that config is first. This will allow us to easily add subscriptions as the optional final parameter. Also since we will have another option for a top level name I combined all the names into a single object

[codecov]

Codecov Report

Merging #160 into master will decrease coverage by 0.18%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##             master    #160      +/-   ##
===========================================
- Coverage     96.79%   96.6%   -0.19%     
+ Complexity      152     151       -1     
===========================================
  Files            53      53              
  Lines           499     501       +2     
  Branches        100     100              
===========================================
+ Hits            483     484       +1     
  Misses            4       4              
- Partials         12      13       +1

Impacted Files	Coverage Δ	Complexity Δ
src/main/kotlin/com/expedia/graphql/toSchema.kt	100% <ø> (ø)	0 <0> (ø)	⬇️
...xpedia/graphql/generator/types/QueryTypeBuilder.kt	100% <100%> (ø)	6 <0> (ø)	⬇️
...dia/graphql/generator/types/MutationTypeBuilder.kt	100% <100%> (ø)	6 <0> (ø)	⬇️
...otlin/com/expedia/graphql/SchemaGeneratorConfig.kt	100% <100%> (ø)	5 <1> (-1)	⬇️
...pedia/graphql/generator/types/ObjectTypeBuilder.kt	94.11% <0%> (-5.89%)	2% <0%> (ø)

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