Add `coverage_reporter_platform` parameter (#49)

* Add support for coverage_reporter_platform input parameter.
* Add logic to select correct architecture-specific binary of coverage-reporter when coverage_reporter_platform is supplied. 
* Add tests.

Add debug parameter to enable set -x-style debugging (#48)

* Add debug parameter to enable set -x-style debugging throughout entire script, including setup steps. 
* The new debug option will replace the verbose param, which is now deprecated. 
* Until fully deprecated, both debug and verbose do the same two (2) things. They: 
  * Enable set-x style debugging in the script; and 
  & Add the --debug flag to all coverage-reporter commands to enable verbose output from the Coveralls API.

Add `coverage_reporter_version` parameter. (#47)

* Add coverage_reporter_version to `coveralls/upload` parameters.
* Modify tests to test coverage_reporter_version and add workflow step to check the version against expectation.

Extend the `fail_on_error` option's behavior to setup failures (#46)

* Make sure the fail_on_error option also applies to setup failures like the failure to download the binary, verify it with checksums, or find the downloaded binary, rather than just to failures in the coveralls commands, like coveralls report and coveralls done.
* Bump up orb versions.

2.2.1: add fail_on_error, measure, coverage_files options

2.2.0: fix relative paths, use explicit syntax

2.1.2: add better error messaging for coverage_file values

2.1.1: check hashsum before using binary

2.1.0: add missing parameters from github action

2.0.0: use universal coverage reporter