Update kotlin-metadata library from 1.1.0 to 1.2.0

[Takhion]

I'm preparing to finally release the kotlin-metadata library so I renamed a few things and moved some utils form kategory to the library, which simplifies the code a bit.

I hope I didn't break anything!

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@3abc0c4). Click here to learn what that means.
The diff coverage is 0%.

@@            Coverage Diff            @@
##             master     #263   +/-   ##
=========================================
  Coverage          ?   41.98%           
  Complexity        ?      259           
=========================================
  Files             ?      136           
  Lines             ?     3127           
  Branches          ?      398           
=========================================
  Hits              ?     1313           
  Misses            ?     1688           
  Partials          ?      126

Impacted Files	Coverage Δ	Complexity Δ
...ava/kategory/common/messager/MessagerExtensions.kt	0% <ø> (ø)	0 <0> (?)
...in/java/kategory/common/utils/AbstractProcessor.kt	0% <ø> (ø)	0 <0> (?)
.../java/kategory/implicits/ImplicitsFileGenerator.kt	0% <ø> (ø)	0 <0> (?)
.../main/java/kategory/common/utils/ProcessorUtils.kt	0% <0%> (ø)	0 <0> (?)

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[raulraja]

Awesome, thanks @Takhion !