4.0.0 update

[virustotalop]

• Support serializers
• Drop apache commons io
• Add builder
• Make code more dry
• Drop java 8 support, now we build with java 11
• Update gradle
• Drop using shadow
• Update license
• Use licenser plugin

[codecov]

Codecov Report

Attention: 36 lines in your changes are missing coverage. Please review.

Comparison is base (fe3eeb0) 87.50% compared to head (ce56840) 87.53%.

Files	Patch %	Lines
...in/java/com/clubobsidian/wrappy/Configuration.java	86.77%	8 Missing and 8 partials ⚠️
.../com/clubobsidian/wrappy/ConfigurationSection.java	88.39%	8 Missing and 5 partials ⚠️
...ava/com/clubobsidian/wrappy/helper/NodeHelper.java	80.00%	3 Missing ⚠️
...in/java/com/clubobsidian/wrappy/util/HashUtil.java	78.57%	3 Missing ⚠️
...bobsidian/wrappy/inject/ConfigurationInjector.java	85.71%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #52      +/-   ##
============================================
+ Coverage     87.50%   87.53%   +0.03%     
+ Complexity      119      109      -10     
============================================
  Files             9        9              
  Lines           320      337      +17     
  Branches         40       40              
============================================
+ Hits            280      295      +15     
+ Misses           27       26       -1     
- Partials         13       16       +3     

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