Change the loader text when an error occurs

[clarkwinkelmann]

Fixes #67

[codecov-io]

Codecov Report

Merging #68 into master will increase coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #68      +/-   ##
==========================================
+ Coverage   29.27%   29.28%   +0.01%     
==========================================
  Files          43       43              
  Lines         919     1055     +136     
==========================================
+ Hits          269      309      +40     
- Misses        650      746      +96

Impacted Files	Coverage Δ
src/Composer/Commands/RequireCommand.php	88.88% <0%> (-2.78%)	:arrow_down:
src/Composer/ComposerEnvironment.php	85.41% <0%> (-2.09%)	:arrow_down:
src/Composer/Utils/ComposerFileEditor.php	92.1% <0%> (-1.65%)	:arrow_down:
src/Composer/Utils/JsonManipulator.php	40.65% <0%> (-1.11%)	:arrow_down:
src/Composer/Commands/BaseCommand.php	92.3% <0%> (-1.03%)	:arrow_down:
src/Api/Controllers/UpdateExtensionController.php	0% <0%> (ø)	:arrow_up:
src/Events/ExtensionWasUpdated.php	0% <0%> (ø)	:arrow_up:
src/Listeners/AddClientAssets.php	0% <0%> (ø)	:arrow_up:
...c/Api/Controllers/UninstallExtensionController.php	0% <0%> (ø)	:arrow_up:
src/Jobs/ComposerJob.php	0% <0%> (ø)	:arrow_up:
... and 26 more

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[luceos]

I've pushed a change that handles the size aspect. Can you review and merge this if agreed on @clarkwinkelmann ?

[clarkwinkelmann]

Looks fine.

I added the suggested issue tracker link:

I also checked this PR against beta7, everything seems fine. I'm merging