(koin) fix: fix get() called to nullable variable type exception

[rIIh]

After this change it is safe to use get() on nullable type variables. Previously such interaction has throw NoBeanDefFoundException.

In Kotlin generic T type full name is not has '?' ending as it has in Dart language. Because of that IMO we should use only non nullable type names for index keys.

[codecov-commenter]

Codecov Report

Merging #14 (11104d0) into master (91846f7) will increase coverage by 0.01%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #14      +/-   ##
==========================================
+ Coverage   93.68%   93.69%   +0.01%     
==========================================
  Files          30       30              
  Lines         807      809       +2     
==========================================
+ Hits          756      758       +2     
  Misses         51       51              

Impacted Files	Coverage Δ
...s/koin/lib/src/definition/provider_definition.dart	98.52% <100.00%> (+0.04%)	:arrow_up:

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[rIIh]

Seems to be abandoned

Closing