message: fix(globals): declare __ENV__
diff: @@ -3,7 +3,7 @@ declare module '*.css' {
  export default content;
  }
  -interface SvgrComponent extends React.StatelessComponent<React.SVGAttributes<SVGElement>> {}
  +interface SvgrComponent extends React.FunctionComponent<React.SVGAttributes<SVGElement>> {}
  declare module '*.svg' {
  const svgUrl: string;
  @@ -13,3 +13,4 @@ declare module '*.svg' {
  }
  declare var __REACT_FLOW_VERSION__: string;
  +declare var __ENV__: string;
  