feat: add <Upload> component stub

Author: streamich

README.md

@@ -61,7 +61,7 @@ const MyComponent = mock();
      - [`<LocationSensor>`](./docs/en/LocationSensor.md), [`withLocation()`](./docs/en/LocationSensor.md#withlocation-hoc), and [`@withLocation`](./docs/en/LocationSensor.md#withlocation-decora)
      - [`<OrientationSensor>`](./docs/en/OrientationSensor.md), [`withOrientation()`](./docs/en/OrientationSensor.md#withorientation-hoc), and [`@withOrientation`](./docs/en/OrientationSensor.md#withorientation-decorator)
      - [`<ScrollSensor>`](./docs/en/ScrollSensor.md)
-     - [`<SizeSensor>`](./docs/en/SizeSensor.md), [`withSize()`](./docs/en/SizeSensor.md#withsize-hoc), and [`@withSize`](./docs/en/SizeSensor.md#withsize-decorator)
+     - [`<SizeSensor>`](./docs/en/SizeSensor.md), [`withSize()`](./docs/en/SizeSensor.md#withsize-hoc), and [`@withSize`](./docs/en/SizeSensor.md#withsize-decorator) ([demo](https://codesandbox.io/s/0y2qjm210p))
         - [`<WidthSensor>`](./docs/en/WidthSensor.md), [`withWidth()`](./docs/en/WidthSensor.md#withwidth-hoc-and-withwidth-decorator), and [`@withWidth`](./docs/en/WidthSensor.md#withwidth-hoc-and-withwidth-decorator)
      - [`<ViewportSensor>`](./docs/en/ViewportSensor.md), [`withViewport()`](./docs/en/ViewportSensor.md#withviewport-hoc), and [`@withViewport`](./docs/en/ViewportSensor.md#withviewport-decorator)
         - [`<ViewportScrollSensor>`](./docs/en/ViewportSensor.md#viewportscrollsensor) and [`<ViewportObserverSensor>`](./docs/en/ViewportSensor.md#viewportobserversensor)

src/Upload/index.ts

@@ -0,0 +1,16 @@
+import {Component} from 'react';
+
+export interface IUploadProps {
+}
+
+export interface IUploadState {
+}
+
+export class Upload extends Component<IUploadProps, IUploadState> {
+  onDragOver = (event) => event.preventDefault();
+  onDragEnter = (event) => event.preventDefault();
+
+  onDrop = (event) => {
+    event.preventDefault();
+  };
+}