fix: 3780 - testing ios compilation with mobile_scanner fix

[monsieurtanuki]

Impacted file:

• pubspec.yaml: temporarily using the master branch for mobile_scanner

What

• There were compilation problems in ios, probably due to different xcode versions, inside package mobile_scanner.
• Some code was merged (fix: 544 - explicit returned type for compactMap juliansteenbakker/mobile_scanner#568) that is supposed to fix it.
• The current PR is a test if the compilation problems would go away with the latest mobile_scanner code.
• Eventually, there would be a new release of mobile_scanner and we would use it directly.

Fixes bug(s)

• Fixes: iOS build is failing due to mobile_scanner #3780

[codecov-commenter]

Codecov Report

Merging #3822 (6949343) into develop (0d48729) will increase coverage by 0.00%.
The diff coverage is 0.00%.

@@           Coverage Diff            @@
##           develop    #3822   +/-   ##
========================================
  Coverage    10.67%   10.67%           
========================================
  Files          272      272           
  Lines        13547    13546    -1     
========================================
  Hits          1446     1446           
+ Misses       12101    12100    -1     

Impacted Files	Coverage Δ
...mooth_app/lib/pages/product/edit_product_page.dart	0.45% <0.00%> (+<0.01%)	⬆️

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[teolemon]

👌

[monsieurtanuki]

Thank you @teolemon for the review!
@juliansteenbakker I'm not 100% sure everything has been tested yet (like, the full build of our app on ios with your master branch), but we'll keep you posted rapidly.