lib/plugins/aws/invokeLocal/index.js/AwsInvokeLocal/getConfiguredEnvVars
class AwsInvokeLocal:  getConfiguredEnvVars() {
    const providerEnvVars = this.serverless.service.provider.environment || {};
    const functionEnvVars = this.options.functionObj.environment || {};
    return _.merge(providerEnvVars, functionEnvVars);
  }