Fix(client): Add readOnlyFunctionArgs

[friedger]

This PR

• adds ReadOnlyFunctionArgs and the corresponding parameter to SmartContractApi.callReadOnlyFunction
• fixes CallReadOnlyFunctionRequest should have functionArgs as property #232
• adds a test in client/test/test.ts

The test result of the call against the current argon testnet is

{ okay: true, result: '0x09', cause: undefined }

[codecov]

Codecov Report

Merging #234 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #234   +/-   ##
=======================================
  Coverage   63.75%   63.75%           
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  Files          52       52           
  Lines        3438     3438           
  Branches      590      590           
=======================================
  Hits         2192     2192           
  Misses       1243     1243           
  Partials        3        3           

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[zone117x]

Thanks @friedger!

[blockstack-devops]

🎉 This PR is included in version 0.14.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• npm package (@latest dist-tag)
• GitHub release

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