#117: Activate some strict TS settings

[Airblader]

This pull request relates to or closes the following issues:

I have verified that…

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

[codecov[bot]]

Codecov Report

Merging #126 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #126   +/-   ##
=======================================
  Coverage   85.29%   85.29%           
=======================================
  Files          25       25           
  Lines         721      721           
  Branches      111      111           
=======================================
  Hits          615      615           
  Misses         51       51           
  Partials       55       55

Impacted Files	Coverage Δ
projects/ngqp/core/src/lib/model/query-param.ts	93.25% <ø> (ø)	:arrow_up:

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