👽 deprecate all lower-case HTTP method annotations

[techouse]

This pull request includes changes to the chopper library to standardize HTTP method annotations by replacing the old annotations with new uppercase versions and marking the old ones as deprecated. Additionally, it updates the test service to use the new annotations.

Standardization of HTTP method annotations:

• chopper/lib/src/annotations.dart: Introduced new uppercase HTTP method annotations (GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS) and marked the old ones as deprecated. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]

• chopper/lib/src/annotations.dart: Updated constant definitions to use the new uppercase HTTP method annotations.

Updates to test service:

• chopper/test/test_service.dart: Replaced all instances of the old HTTP method annotations with the new uppercase versions in the HttpTestService class. [1] [2] [3] [4]

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Fixes #632 based on #632 (comment)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.38%. Comparing base (a59df12) to head (3fa27c0).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #651   +/-   ##
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  Coverage    93.38%   93.38%           
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  Files           21       21           
  Lines          499      499           
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  Hits           466      466           
  Misses          33       33           

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[techouse]

@Guldem @JEuler what are your takes on this considering #632 (comment)?

I've noticed that retrofit.dart uses the same approach https://github.com/trevorwang/retrofit.dart/blob/241695bd5af27ddfd60914be1334eb95ce1cc94b/retrofit/lib/http.dart#L124

[Guldem]

LGTM. I kinda dislike the whole deprecation but this is also more inline with usual writing of http methods. That's also a plus I guess 😉

[JEuler]

So cool! Thank you!

[JEuler]

We can remove them somewhere in future.