Standalone query param

[alexey-anufriev]

This pull request relates to or closes the following issues: #61

I have verified that…

• [x] the commits in this pull request follow the conventionalcommits pattern
• [x] tests have been updated or added
• [x] documentation has been updated to reflect the changes made

[codecov[bot]]

Codecov Report

Merging #95 into master will decrease coverage by 0.33%. The diff coverage is 61.36%.

@@            Coverage Diff             @@
##           master      #95      +/-   ##
==========================================
- Coverage   83.46%   83.12%   -0.34%     
==========================================
  Files          23       25       +2     
  Lines         635      652      +17     
  Branches       95       99       +4     
==========================================
+ Hits          530      542      +12     
- Misses         53       54       +1     
- Partials       52       56       +4

Impacted Files	Coverage Δ
...ccessors/range-control-value-accessor.directive.ts	80% <ø> (ø)	:arrow_up:
...cessors/select-control-value-accessor.directive.ts	88.09% <ø> (ø)	:arrow_up:
...cessors/number-control-value-accessor.directive.ts	80.95% <ø> (ø)	:arrow_up:
...ssors/checkbox-control-value-accessor.directive.ts	84.21% <ø> (ø)	:arrow_up:
projects/ngqp/core/src/lib/query-param.module.ts	80% <ø> (ø)	:arrow_up:
...s/multi-select-control-value-accessor.directive.ts	83.67% <ø> (ø)	:arrow_up:
...essors/default-control-value-accessor.directive.ts	72.72% <ø> (ø)	:arrow_up:
...e/src/lib/directives/query-param-name.directive.ts	61.11% <100%> (+7.45%)	:arrow_up:
...re/src/lib/directives/query-param-group.service.ts	82.57% <100%> (ø)	:arrow_up:
projects/ngqp/core/src/lib/accessors/util.ts	45.45% <45.45%> (ø)
... and 3 more

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