Add definitions for react-bootstrap-date-picker (#13428)

* Add definitions for react-bootstrap-date-picker

* Add tslint.json

* Add required compiler option

react-bootstrap-date-picker/index.d.ts

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+// Type definitions for react-bootstrap-date-picker 4.0
+// Project: https://github.com/pushtell/react-bootstrap-date-picker#readme
+// Definitions by: Karol Janyst <https://github.com/LKay>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+import { ComponentClass, StatelessComponent, ReactNode, FocusEventHandler, HTMLAttributes } from "react";
+
+export as namespace DatePicker;
+
+export = DatePicker;
+
+declare const DatePicker: DatePicker;
+type DatePicker = ComponentClass<DatePicker.DatePickerProps>;
+
+declare namespace DatePicker {
+
+    export type ChangeCallback = (value: string, formattedValue: string) => void;
+
+    export interface DatePickerProps {
+        value?: string;
+        defaultValue?: string;
+        style?: any;
+        className?: string;
+        autoFocus?: boolean;
+        disabled?: boolean;
+        onChange?: ChangeCallback;
+        onFocus?: FocusEventHandler<any>;
+        onBlur?: FocusEventHandler<any>;
+        dateFormat?: string;
+        clearButtonElement?: ReactNode;
+        showClearButton?: boolean;
+        onClear?: () => void;
+        previousButtonElement?: ReactNode;
+        nextButtonElement?: ReactNode;
+        cellPadding?: string;
+        dayLabels?: string[];
+        monthLabels?: string[];
+        calendarPlacement?: string;
+        calendarContainer?: any;
+        weekStartsOnMonday?: boolean;
+        showTodayButton?: boolean;
+        todayButtonLabel?: string;
+        customControl?: StatelessComponent<any> | ComponentClass<any>;
+    }
+
+}

react-bootstrap-date-picker/react-bootstrap-date-picker-tests.tsx

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+import * as React from "react"
+import { DropdownMenu } from "react-bootstrap"
+import * as DatePicker from "react-bootstrap-date-picker"
+
+const Custom: React.StatelessComponent<{}> = () => {
+    return (<div />);
+}
+
+class Test extends React.Component<{}, {}> {
+
+    public render () {
+        return (
+            <DatePicker autoFocus={ false }
+                        onChange={ (value: string, c: string) => {} }
+                        dateFormat="MM/DD/YYYY"
+                        clearButtonElement="x"
+                        showClearButton={ true }
+                        onClear={ () => {} }
+                        previousButtonElement="<"
+                        nextButtonElement=">"
+                        cellPadding="2px"
+                        dayLabels={ ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'] }
+                        monthLabels={ ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'] }
+                        calendarPlacement="top"
+                        weekStartsOnMonday={ true }
+                        showTodayButton={ true }
+                        todayButtonLabel="Today"
+                        customControl={ Custom } />
+        )
+    }
+
+}

react-bootstrap-date-picker/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es6",
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true,
+        "jsx": "react"
+    },
+    "files": [
+        "index.d.ts",
+        "react-bootstrap-date-picker-tests.tsx"
+    ]
+}

react-bootstrap-date-picker/tslint.json

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+{ "extends": "../tslint.json" }