[ISSUE-197] Fix linting

[jama5262]

What does this PR do?

Fix linting

Resolves #197

[codecov]

Codecov Report

Base: 96.30% // Head: 96.30% // No change to project coverage 👍

Coverage data is based on head (3a683d8) compared to base (b309a4a).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #198   +/-   ##
========================================
  Coverage    96.30%   96.30%           
========================================
  Files           34       34           
  Lines         1543     1543           
========================================
  Hits          1486     1486           
  Misses          57       57           

Impacted Files	Coverage Δ
lib/src/default_display.dart	100.00% <ø> (ø)
lib/src/locale/available_locales.dart	100.00% <ø> (ø)
lib/src/locale/locales/ar_locale.dart	78.44% <ø> (ø)
lib/src/locale/locales/az_locale.dart	79.16% <ø> (ø)
lib/src/locale/locales/bn_locale.dart	100.00% <ø> (ø)
lib/src/locale/locales/de_locale.dart	100.00% <ø> (ø)
lib/src/locale/locales/en_locale.dart	100.00% <ø> (ø)
lib/src/locale/locales/es_locale.dart	100.00% <ø> (ø)
lib/src/locale/locales/fa_locale.dart	100.00% <ø> (ø)
lib/src/locale/locales/fr_locale.dart	100.00% <ø> (ø)
... and 22 more

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