move to flutter_lint

[renefloor]

✨ What kind of change does this PR introduce? (Bug fix, feature, docs update...)

bug fix

⤵️ What is the current behavior?

Currently pedantic is used for analysis, but that's discontinued

🆕 What is the new behavior (if this is a feature change)?

Now using flutter_lint

💥 Does this PR introduce a breaking change?

no

🐛 Recommendations for testing

📝 Links to relevant issues/docs

🤔 Checklist before submitting

• All projects build
• Follows style guide lines (code style guide)
• Relevant documentation was updated
• Rebased onto current develop

[codecov]

Codecov Report

Merging #351 (c835a95) into develop (d124fe0) will not change coverage.
The diff coverage is n/a.

❗ Current head c835a95 differs from pull request most recent head 30529df. Consider uploading reports for the commit 30529df to get more accurate results

@@           Coverage Diff            @@
##           develop     #351   +/-   ##
========================================
  Coverage    75.39%   75.39%           
========================================
  Files           22       22           
  Lines          691      691           
========================================
  Hits           521      521           
  Misses         170      170           

Impacted Files	Coverage Δ
...ter_cache_manager/lib/src/compat/file_fetcher.dart	77.77% <ø> (ø)
flutter_cache_manager/lib/src/logger.dart	80.00% <ø> (ø)
...lutter_cache_manager/lib/src/result/file_info.dart	100.00% <ø> (ø)

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