add typings for slice-ansi package (#30423)

types/slice-ansi/index.d.ts

@@ -0,0 +1,8 @@
+// Type definitions for slice-ansi 2.0
+// Project: https://github.com/chalk/slice-ansi#readme
+// Definitions by: Dan Imhoff <https://github.com/dwieeb>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function sliceAnsi(input: string, beginSlice: number, endSlice?: number): string;
+
+export = sliceAnsi;

types/slice-ansi/slice-ansi-tests.ts

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+import sliceAnsi = require('slice-ansi');
+
+// $ExpectType string
+sliceAnsi('The quick brown \u001b[31mfox jumped over \u001b[39mthe lazy \u001b[32mdog and then ran away with the unicorn.\u001b[39m', 20, 30);
+
+// $ExpectType string
+sliceAnsi('test', 1);
+
+// $ExpectError
+sliceAnsi();
+
+// $ExpectError
+sliceAnsi(5);

types/slice-ansi/tsconfig.json

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

types/slice-ansi/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }