fix(resizer): fix a regression bug caused by previous PR #341

[ghiscoding]

• resizer service init must be done only after SlickGrid is initialized, else we end up binding our resize to a grid dom element that doesn't yet exist in the DOM
• this regression bug wasn't caught earlier because there's no Cypress E2E to test that since it's too hard to test, basically it was caught manually since I found out the auto-resize stopped working (it failed silently) and I was wondering why that suddenly happened

[codecov]

Codecov Report

Merging #347 (462e330) into master (e775cfa) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #347   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          212       212           
  Lines        13135     13135           
  Branches      4307      4307           
=========================================
  Hits         13135     13135           

Impacted Files	Coverage Δ
...bundle/src/components/slick-vanilla-grid-bundle.ts	100.00% <100.00%> (ø)

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