Add uslug (#34054)

* Add uslug type definitions

* Fix header of uslug

types/uslug/index.d.ts

@@ -0,0 +1,24 @@
+// Type definitions for uslug 1.0
+// Project: https://github.com/jeremys/uslug
+// Definitions by: Junyoung Choi <https://github.com/rokt33r>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/**
+ * Generate a slug for the string passed.
+ * @param value The string you want to slugify
+ * @param options An optional object that can contain:
+ *   - allowedChars: a String of chars that you want to be whitelisted. Default: '-_~'.
+ *   - lower: a Boolean to force to lower case the slug. Default: true.
+ *   - spaces: a Boolean to allow spaces. Default: false.
+ */
+declare function uslug(value: string, options?: uslug.UslugOptions): string;
+
+declare namespace uslug {
+  interface UslugOptions {
+    allowedChars?: string;
+    lower?: boolean;
+    spaces?: boolean;
+  }
+}
+
+export = uslug;

types/uslug/tsconfig.json

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+{
+  "compilerOptions": {
+      "module": "commonjs",
+      "lib": [
+          "es6"
+      ],
+      "noImplicitAny": true,
+      "noImplicitThis": true,
+      "strictNullChecks": false,
+      "strictFunctionTypes": true,
+      "baseUrl": "../",
+      "typeRoots": [
+          "../"
+      ],
+      "types": [],
+      "noEmit": true,
+      "forceConsistentCasingInFileNames": true
+  },
+  "files": [
+      "index.d.ts",
+      "uslug-tests.ts"
+  ]
+}

types/uslug/tslint.json

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

types/uslug/uslug-tests.ts

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+import uslug = require("uslug");
+
+uslug('Быстрее и лучше!'); // 'быстрее-и-лучше'
+uslug('汉语/漢語'); // '汉语漢語'
+
+uslug('Y U NO', { lower: false }); // 'Y-U-NO'
+uslug('Y U NO', { spaces: true }); // 'y u no'
+uslug('Y-U|NO', { allowedChars: '|' }); // 'yu|no'