message: Fixed tslint issue.
diff: import { EventEmitter } from 'events';
  import * as path from 'path';
  +import { CodeWithSourceMap } from 'source-map';
  import { CompletionItem, CompletionItemKind, Hover, Position, Range } from 'vscode-languageserver';
  -import { CodeWithSourceMap } from 'source-map';
  import { diagnosticMessages } from '../DiagnosticMessages';
  import { FunctionScope } from '../FunctionScope';
  import { Callable, Diagnostic, File, FileReference, FunctionCall } from '../interfaces';
  