Use https url for git packages

[sidrao2006]

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

Dependency changes

:arrow_heading_down: What is the current behavior?

Uses git:// url

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

Switch to https:// url

:boom: Does this PR introduce a breaking change?

No (dependency update in example)

:bug: Recommendations for testing

N/A

:memo: Links to relevant issues/docs

Unauthenticated git protocol is no longer supported.

https://github.blog/2021-09-01-improving-git-protocol-security-github/

:thinking: Checklist before submitting

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

[codecov[bot]]

Codecov Report

Merging #372 (f2655a2) into develop (205387b) will increase coverage by 0.10%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #372      +/-   ##
===========================================
+ Coverage    75.28%   75.39%   +0.10%     
===========================================
  Files           23       22       -1     
  Lines          692      691       -1     
===========================================
  Hits           521      521              
+ Misses         171      170       -1     

Impacted Files	Coverage Δ
flutter_cache_manager/lib/src/config/config.dart

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[renefloor]

Fixed in #368