Update counter example

[K9i-0]

enable riverpod_lint

There was riverpod_lint in dev_dependencies, but since custom_lint was not added in analysis_options, I modified analysis_options.yaml.

remove unnecessary Consumer

After checking the History, there was a Consumer added when the example was using StatelessWidget, but it seemed unnecessary now since it has been replaced with ConsumerWidget, so I removed it.
c44d952

[codecov]

Codecov Report

Merging #2305 (b4fea06) into master (6031730) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2305   +/-   ##
=======================================
  Coverage   95.24%   95.24%           
=======================================
  Files          53       53           
  Lines        2250     2250           
=======================================
  Hits         2143     2143           
  Misses        107      107           

[robpot95]

Correct me if i'm wrong. But consumer is there to narrow rebuild to only the Text widget

[K9i-0]

I think the feedback is correct. However, since the example Widget is very simple, I felt that it would be better to improve readability by removing the Consumer rather than reducing the rebuild scope.

[rrousselGit]

Thanks!