fix: Adding sleep since go test cases are running before mock server …

…is up (#543)

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# Fixes #

A short description of what this PR does.

### Checklist
- [x] I acknowledge that all my contributions will be made under the
project's license
- [ ] Run `make test-docker`
- [ ] Verify affected language:
- [ ] Generate [twilio-go](https://github.com/twilio/twilio-go) from our
[OpenAPI specification](https://github.com/twilio/twilio-oai) using the
[build_twilio_go.py](./examples/build_twilio_go.py) using `python
examples/build_twilio_go.py path/to/twilio-oai/spec/yaml
path/to/twilio-go` and inspect the diff
    - [ ] Run `make test` in `twilio-go`
    - [ ] Create a pull request in `twilio-go`
    - [ ] Provide a link below to the pull request
- [ ] I have made a material change to the repo (functionality, testing,
spelling, grammar)
- [ ] I have read the [Contribution
Guidelines](https://github.com/twilio/twilio-oai-generator/blob/main/CONTRIBUTING.md)
and my PR follows them
- [x] I have titled the PR appropriately
- [ ] I have updated my branch with the main branch
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have added the necessary documentation about the functionality
in the appropriate .md file
- [ ] I have added inline documentation to the code I modified

If you have questions, please create a GitHub Issue in this repository.

examples/go/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18
+FROM golang:1.20
 
 ENV GOPATH /go
 
@@ -9,4 +9,4 @@ RUN go get -u github.com/twilio/twilio-go@main
 RUN go get -u github.com/twilio/terraform-provider-twilio@main
 
 # pipefail prevents errors in a pipeline from being masked.
-CMD ["/bin/bash", "-c", "set -o pipefail && go test -race ./... -coverprofile /local/coverage.out -json | tee /local/test-report.out"]
+CMD ["/bin/bash", "-c", "sleep 25 && set -o pipefail && go test -race ./... -coverprofile /local/coverage.out -json | tee /local/test-report.out"]

examples/go/go-client/go.mod

@@ -1,6 +1,6 @@
 module go-client
 
-go 1.18
+go 1.20
 
 require (
 	github.com/golang/mock v1.6.0