WIP: improve code coverage

[tMaxx]

Fixes #34

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.

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I hereby agree to the terms of the Knot.x Contributor License Agreement.

[codecov[bot]]

Codecov Report

Merging #35 into master will increase coverage by 1.93%. The diff coverage is 77.27%.

@@             Coverage Diff              @@
##             master      #35      +/-   ##
============================================
+ Coverage     80.48%   82.41%   +1.93%     
- Complexity      173      190      +17     
============================================
  Files            21       25       +4     
  Lines           707      745      +38     
  Branches         52       56       +4     
============================================
+ Hits            569      614      +45     
+ Misses          106       95      -11     
- Partials         32       36       +4

Impacted Files	Coverage Δ	Complexity Δ
...va/io/knotx/junit5/assertions/KnotxAssertions.java	100% <ø> (ø)	5 <0> (ø)	:arrow_down:
src/main/java/io/knotx/junit5/util/HoconUtil.java	100% <ø> (ø)	4 <0> (ø)	:arrow_down:
...knotx/junit5/util/TestConfigurationHttpServer.java	86.36% <ø> (ø)	6 <0> (?)
...rc/main/java/io/knotx/junit5/util/RequestUtil.java	0% <ø> (ø)	0 <0> (ø)	:arrow_down:
...rc/main/java/io/knotx/junit5/util/ReflectUtil.java	57.57% <0%> (ø)	5 <0> (ø)	:arrow_down:
src/main/java/io/knotx/junit5/util/FileReader.java	40% <0%> (-10%)	2 <0> (ø)
src/main/java/io/knotx/junit5/util/StreamUtil.java	100% <100%> (ø)	2 <1> (ø)	:arrow_down:
.../knotx/junit5/assertions/HtmlMarkupAssertions.java	100% <100%> (+100%)	4 <1> (+4)	:arrow_up:
...tx/junit5/assertions/HtmlMarkupAssertionsTest.java	85.71% <85.71%> (ø)	5 <5> (?)
.../java/io/knotx/junit5/util/FreePortFinderTest.java	100% <0%> (ø)	4% <0%> (?)
... and 4 more

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