fix: test failures on darwin

[shyim]

Reason for This PR

Port 55555 is blocked for some reason on Darwin.

       > --- FAIL: TestNewClient_ConnectionError (0.00s)
       >     client_test.go:38:
       >         	Error Trace:	/private/tmp/nix-build-roadrunner-2023.2.2.drv-0/source/internal/rpc/client_test.go:38
       >         	Error:      	"dial tcp 127.0.0.1:0: connect: can't assign requested address" does not contain "connection refused"
       >         	Test:       	TestNewClient_ConnectionError
       > --- FAIL: TestNewClient_SuccessfullyConnected (0.00s)
       >     client_test.go:43:
       >         	Error Trace:	/private/tmp/nix-build-roadrunner-2023.2.2.drv-0/source/internal/rpc/client_test.go:43
       >         	Error:      	Received unexpected error:
       >         	            	listen tcp 127.0.0.1:55555: bind: address already in use
       >         	Test:       	TestNewClient_SuccessfullyConnected
       >     client_test.go:49:
       >         	Error Trace:	/private/tmp/nix-build-roadrunner-2023.2.2.drv-0/source/internal/rpc/client_test.go:49
       >         	Error:      	Expected value not to be nil.
       >         	Test:       	TestNewClient_SuccessfullyConnected
       >     client_test.go:50:
       >         	Error Trace:	/private/tmp/nix-build-roadrunner-2023.2.2.drv-0/source/internal/rpc/client_test.go:50
       >         	Error:      	Received unexpected error:
       >         	            	dial tcp 127.0.0.1:55555: connect: connection refused
       >         	Test:       	TestNewClient_SuccessfullyConnected

Also connecting to port 0 is not supported in Darwin:

       > --- FAIL: TestNewClient_ConnectionError (0.00s)
       >     client_test.go:38:
       >         	Error Trace:	/private/tmp/nix-build-roadrunner-2023.2.2.drv-0/source/internal/rpc/client_test.go:38
       >         	Error:      	"dial tcp 127.0.0.1:0: connect: can't assign requested address" does not contain "connection refused"
       >         	Test:       	TestNewClient_ConnectionError

Description of Changes

[Author TODO: add description of changes.]

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[rustatian]

Hey @shyim 👋🏻
Yeah, according to the wiki, it's allocated by the BigSur and later. Good catch 👍🏻

[codecov]

Codecov Report

Merging #1680 (7c8c781) into master (82cd320) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1680   +/-   ##
=======================================
  Coverage   38.00%   38.00%           
=======================================
  Files          16       16           
  Lines         842      842           
=======================================
  Hits          320      320           
  Misses        496      496           
  Partials       26       26           

[rustatian]

LGTM, thanks @shyim 👍🏻