Removed bluebird dependency

[Navarjun]

Issue #14882

• Bluebird promise was being used for getting cached image sizes using .props method. It has been removed to be replaced by native promise using Promise.all

[codecov[bot]]

Codecov Report

Merging #14940 (5a94add) into main (3231863) will increase coverage by 0.00%. The diff coverage is 39.58%.

@@           Coverage Diff           @@
##             main   #14940   +/-   ##
=======================================
  Coverage   52.60%   52.60%           
=======================================
  Files        1392     1392           
  Lines       89130    89137    +7     
  Branches    10131    10130    -1     
=======================================
+ Hits        46884    46888    +4     
- Misses      42194    42197    +3     
  Partials       52       52           

Impacted Files	Coverage Δ
ghost/core/core/frontend/meta/image-dimensions.js	55.07% <38.29%> (+5.89%)	:arrow_up:
ghost/core/core/frontend/meta/get-meta.js	100.00% <100.00%> (ø)
ghost/admin/app/components/gh-file-uploader.js	89.47% <0.00%> (-2.26%)	:arrow_down:

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[Navarjun]

I re-ran all the tests on my end… everything passes. In the subsequent commits, I have removed BB from another file in the same folder.

[ErisDS]

Hey @Navarjun, nice to see you here! Thank you for this PR, really appreciate you taking the time to help out. I've just updated the original issue to be a bit clearer that we need to remove catch predicates first (and why). I'll hold onto this PR and merge it once that work is done.

[anlexN]

@ErisDS when to merge? I am reviewing the repo step by step. So many source codes can be decreased. So many source codes can be refactored by modern syntax!

[ErisDS]

Hey @Navarjun hope your'e doing well! We finally got rid of all the catch predicates, so I've merged this. Thanks again!