feat: log a better exception on invalid argument types

[smyrick]

The new exception reads as following

com.expedia.graphql.exceptions.CouldNotCastArgumentException: Could not cast or map arguments in the data fetcher for parameter #1 items of fun com.expedia.graphql.execution.FunctionDataFetcherTest.MyClass.printList(kotlin.collections.List<kotlin.String>): kotlin.String

Also I added unit tests for the function data fetcher

[codecov]

Codecov Report

Merging #161 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #161      +/-   ##
============================================
+ Coverage     96.79%   96.82%   +0.03%     
- Complexity      152      153       +1     
============================================
  Files            53       54       +1     
  Lines           499      504       +5     
  Branches        100      100              
============================================
+ Hits            483      488       +5     
  Misses            4        4              
  Partials         12       12

Impacted Files	Coverage Δ	Complexity Δ
...dia/graphql/generator/types/FunctionTypeBuilder.kt	85.18% <100%> (ø)	11 <0> (ø)	⬇️
...m/expedia/graphql/execution/FunctionDataFetcher.kt	77.77% <100%> (+2.77%)	9 <0> (ø)	⬇️
...raphql/exceptions/CouldNotCastArgumentException.kt	100% <100%> (ø)	1 <1> (?)
...aphql/exceptions/InvalidInputFieldTypeException.kt	100% <100%> (ø)	1 <1> (ø)	⬇️

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