Improve Helpers

[szepeviktor]

@terrylinooo Fix various errors, make the code shorter and more readable.

[codecov-commenter]

Codecov Report

Merging #26 into 2.x will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##                2.x      #26   +/-   ##
=========================================
  Coverage     99.97%   99.97%           
  Complexity     1175     1175           
=========================================
  Files            88       88           
  Lines          3988     3987    -1     
=========================================
- Hits           3987     3986    -1     
  Misses            1        1           

Impacted Files	Coverage Δ	Complexity Δ
src/Firewall/Kernel/SessionTrait.php	100.00% <ø> (ø)	16.00 <0.00> (ø)
src/Firewall/Session.php	100.00% <100.00%> (ø)	28.00 <0.00> (ø)
src/Firewall/Kernel/TemplateTrait.php	100.00% <0.00%> (ø)	21.00% <0.00%> (ø%)

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[terrylinooo]

Thank you. I will reivew your contribution later.

[terrylinooo]

Unit testing failed. I will carefully check them one by one.

[szepeviktor]

I'm sorry, I thought Scrutinizer runs the unit tests.

[terrylinooo]

@szepeviktor It's okay. Thank you very much for contributing. I have just implemented GitHub Action, it may help to check the PRs. This PR is closed becasue too many changes. It is better to split them into serveral small PRs. You can also do unit testing for the changes. Here is the step by step guide: https://github.com/terrylinooo/shieldon/wiki/Contributing

[szepeviktor]

Okay! You can still pick changes by hand.