Addon-knobs: add typings.d.ts to remove ts-ignore usage

addons/knobs/src/KnobManager.ts

@@ -1,15 +1,12 @@
 /* eslint no-underscore-dangle: 0 */
 
-// @ts-ignore
 import { navigator } from 'global';
 import escape from 'escape-html';
-// TODO: remove ts-ignore once client-api is typed
-// @ts-ignore
 import { getQueryParams } from '@storybook/client-api';
 // eslint-disable-next-line import/no-extraneous-dependencies
 import { Channel } from '@storybook/channels';
 
-import KnobStore, { Knob, KnobStoreKnob } from './KnobStore';
+import KnobStore, { Knob } from './KnobStore';
 import { SET } from './shared';
 
 import { deserializers } from './converters';

addons/knobs/src/components/Panel.tsx

@@ -1,7 +1,6 @@
 import React, { PureComponent, Fragment, ComponentType } from 'react';
 import PropTypes from 'prop-types';
 import qs from 'qs';
-// @ts-ignore
 import { document } from 'global';
 import { styled } from '@storybook/theming';
 import copy from 'copy-to-clipboard';

addons/knobs/src/components/types/Color.tsx

@@ -1,4 +1,3 @@
-// @ts-ignore
 import { document } from 'global';
 import PropTypes from 'prop-types';
 import React, { Component, WeakValidationMap } from 'react';

addons/knobs/src/components/types/Files.tsx

@@ -1,4 +1,3 @@
-// @ts-ignore
 import { FileReader } from 'global';
 import PropTypes from 'prop-types';
 import React, { ChangeEvent, FunctionComponent } from 'react';
@@ -26,7 +25,7 @@ const FileInput = styled(Form.Input)({
 function fileReaderPromise(file: File) {
   return new Promise<string>(resolve => {
     const fileReader = new FileReader();
-    fileReader.onload = (e: Event) => resolve((e.currentTarget as FileReader).result);
+    fileReader.onload = (e: Event) => resolve((e.currentTarget as FileReader).result as string);
     fileReader.readAsDataURL(file);
   });
 }

addons/knobs/src/typings.d.ts

@@ -0,0 +1,2 @@
+declare module 'global';
+declare module '@storybook/client-api';

addons/knobs/tsconfig.json

@@ -4,10 +4,6 @@
     "rootDir": "./src",
     "types": ["webpack-env"]
   },
-  "include": [
-    "src/**/*"
-  ],
-  "exclude": [
-    "src/__tests__/**/*"
-  ]
+  "include": ["src/**/*"],
+  "exclude": ["src/__tests__/**/*"]
 }