Issue 19: Fix mocha deprecation warnings
Issue 19: Fix mocha deprecation warnings

Changed the mocha requirement to now require mocha/api, which fixed the
deprecation warnings.

sorrowless/puppet-openssl,ehelms/puppet-openssl,MiamiOH/puppet-openssl,fuel-infra/puppet-openssl,MiamiOH/puppet-openssl,robbat2/puppet-openssl,bschonec/puppet-openssl,camptocamp/puppet-openssl,fuel-infra/puppet-openssl,sorrowless/puppet-openssl,robbat2/puppet-openssl,bschonec/puppet-openssl,camptocamp/puppet-openssl