message: Update minimum Mono version to 6.6.0
  Update to match the OmniSharp-Roslyn required Mono version.
diff: @@ -11,7 +11,8 @@ import { MonoInformation } from '../constants/MonoInformation';
  import { IGetMonoVersion } from '../constants/IGetMonoVersion';
  export class OmniSharpMonoResolver implements IMonoResolver {
  - private minimumMonoVersion = "5.8.1";
  + private minimumMonoVersion = "6.6.0";
  +
  constructor(private getMonoVersion: IGetMonoVersion) {
  }
  