Strict checking for http-binding package

[relu91]

Yet another big PR, really sorry but I couldn't make it shorter because otherwise, the code base would not even compile.

relates to #758

[danielpeintner]

I looked through the code and I did not spot any issue..

Thanks for all the work!

Below a minor question...

[codecov-commenter]

Codecov Report

Merging #1048 (5469a3a) into master (7340a59) will decrease coverage by 0.15%.
Report is 7 commits behind head on master.
The diff coverage is 47.89%.

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@@            Coverage Diff             @@
##           master    #1048      +/-   ##
==========================================
- Coverage   75.78%   75.63%   -0.15%     
==========================================
  Files          80       80              
  Lines       15303    15324      +21     
  Branches     1444     1460      +16     
==========================================
- Hits        11597    11591       -6     
- Misses       3673     3699      +26     
- Partials       33       34       +1     

Files Changed	Coverage Δ
packages/binding-http/src/oauth-manager.ts	98.26% <0.00%> (-0.87%)	⬇️
packages/binding-http/src/routes/event.ts	18.51% <0.00%> (ø)
...ckages/binding-http/src/routes/property-observe.ts	20.00% <0.00%> (-0.41%)	⬇️
...kages/binding-http/src/routes/thing-description.ts	47.48% <0.00%> (-0.54%)	⬇️
...ackages/binding-http/src/oauth-token-validation.ts	93.56% <33.33%> (-1.21%)	⬇️
packages/binding-http/src/routes/action.ts	57.42% <33.33%> (+2.88%)	⬆️
packages/binding-http/src/routes/properties.ts	63.41% <42.85%> (-1.15%)	⬇️
packages/binding-http/src/routes/property.ts	66.37% <44.44%> (-1.48%)	⬇️
packages/binding-http/src/http-server.ts	83.30% <55.55%> (-1.06%)	⬇️
packages/binding-http/src/http-client-impl.ts	66.58% <63.63%> (-0.97%)	⬇️
... and 6 more

... and 1 file with indirect coverage changes

[danielpeintner]

LGTM