message: feat: collect usage telemetry data
diff: @@ -17,6 +17,10 @@ export class Spawn {
  argMapping: { [id: string]: string } = {}
  ): ChildProcess {
  const envVars = JSON.parse(JSON.stringify(process.env)); // Create copy of environment variables
  +
  + envVars['PACT_EXECUTING_LANGUAGE'] = 'node.js'
  + envVars['PACT_EXECUTING_LANGUAGE_VERSION'] = process.versions.node
  +
  // Remove environment variable if there
  // This is a hack to prevent some weird Travelling Ruby behaviour with Gems
  // https://github.com/pact-foundation/pact-mock-service-npm/issues/16
  