Allow uncommon HTTP methods to support payloads

[arun251]

We use REPORT and other HTTP methods as part of our REST API for their defined semantics. The REPORT method is defined to support a request body. I've refactored isPayloadSupported to explicitly look for the standard HTTP methods that are defined as not supporting request bodies so that uncommon HTTP methods may support request bodies, too.

[codecov]

Codecov Report

Merging #122 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #122   +/-   ##
=======================================
  Coverage   96.32%   96.32%           
=======================================
  Files          10       10           
  Lines        1033     1033           
=======================================
  Hits          995      995           
  Misses         21       21           
  Partials       17       17

Impacted Files	Coverage Δ
util.go	89.83% <100%> (ø)	⬆️

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[jeevatkm]

@arun251 Thank you for the PR.

Do you think, is it good to add HTTP verb method for Report like other methods?

[arun251]

It would be nice, but I'm equally happy using Execute("REPORT", url).