github actions: send coveralls

[avelino]

recently we changed travisci to github action, the coveralls step was not working (the sending), I decided to disable this step to proceed with the replacement, but I needed to enable the step

prest/.github/workflows/build.yml

Lines 97 to 103 in 3bcad82

	- name: goveralls
	if: ${{ false }}
	env:
	COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: |
	go install github.com/mattn/goveralls@latest
	goveralls -coverprofile=coverage.out

is giving the error (is giving the error without returning the problem)

  go install github.com/mattn/goveralls@latest
  goveralls -coverprofile=coverage.out
  shell: bash --noprofile --norc -e -o pipefail {0}
  env:
    PREST_PG_HOST: postgres
    PREST_PG_DATABASE: prest-test
    PREST_PG_USER: postgres
    PREST_PG_PASS: postgres
    PREST_PG_PORT: 5432
    PREST_SSL_MODE: disable
    PREST_CONF: /__w/prest/prest/testdata/prest.toml
    PREST_MIGRATIONS: /__w/prest/prest/testdata/migrations
    PREST_QUERIES_LOCATION: /__w/prest/prest/testdata/queries
    BE_CRASHER: 1
    DOCKER_CLI_EXPERIMENTAL: enabled
    GOROOT: /__t/go/1.17.0/x64
    COVERALLS_TOKEN: ***
go: downloading github.com/mattn/goveralls v0.0.9
go: downloading golang.org/x/mod v0.4.2
go: downloading golang.org/x/tools v0.1.1
failed to fetch git ref "002b7f8e8bab0fb8f479200d7a1283a6c7f2ef32": exit status 128
Error: Process completed with exit code 1.