Add type definitions for airbnb/react-outside-click-handler (#29471)

* Add type definitions for react-outside-click-handler

* Fix tests and fallback to TS 2.9

DT is not supporting typescript 3 yet, so can't properly use defaultProps

types/react-outside-click-handler/index.d.ts

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+// Type definitions for react-outside-click-handler 1.2
+// Project: https://github.com/airbnb/react-outside-click-handler
+// Definitions by: Ivan Zub <https://github.com/zubivan>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.9
+
+import * as React from "react";
+
+export interface DefaultProps {
+    disabled: boolean;
+    useCapture: boolean;
+    display: "block" | "flex" | "inline-block";
+}
+
+// TODO: Remove partial once DT support TS 3.0, so skipping mandatory listed in default props won't result in compile error
+export interface Props extends Partial<DefaultProps> {
+    children: React.ReactNode;
+    onOutsideClick: (e: React.MouseEvent<HTMLElement>) => void;
+}
+
+export default class OutsideClickHandler extends React.Component<Props> {
+    static defaultProps: DefaultProps;
+}

types/react-outside-click-handler/test/react-outside-click-handler-tests.tsx

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+import * as React from "react";
+
+import OutsideClickHandler from "react-outside-click-handler";
+
+const onClickOutside: (event: React.MouseEvent<any>) => void = () => {};
+
+<OutsideClickHandler onOutsideClick={onClickOutside}>
+    <span>Child</span>
+</OutsideClickHandler>;
+
+<OutsideClickHandler onOutsideClick={onClickOutside} disabled={true}>
+    <span>Child</span>
+</OutsideClickHandler>;
+
+<OutsideClickHandler onOutsideClick={onClickOutside} display="block">
+    <span>Child</span>
+</OutsideClickHandler>;
+
+<OutsideClickHandler onOutsideClick={onClickOutside} useCapture={true}>
+    <span>Child</span>
+</OutsideClickHandler>;

types/react-outside-click-handler/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "jsx": "react",
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "test/react-outside-click-handler-tests.tsx"
+    ]
+}

types/react-outside-click-handler/tslint.json

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+{
+    "extends": "dtslint/dt.json"
+}