feat(fast-isnumeric): new type definition v1.1 (#43659)

Small helper function From Plotly project:
- definition file
- tests

https://github.com/plotly/fast-isnumeric#api

Thanks!

types/fast-isnumeric/fast-isnumeric-tests.ts

@@ -0,0 +1,6 @@
+import isNumeric = require('fast-isnumeric');
+
+// tslint:disable-next-line: no-construct
+isNumeric(new String('1')); // $ExpectType boolean
+isNumeric(1); // $ExpectType boolean
+isNumeric('1'); // $ExpectType boolean

types/fast-isnumeric/index.d.ts

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+// Type definitions for fast-isnumeric 1.1
+// Project: https://github.com/plotly/fast-isnumeric#readme
+// Definitions by: Piotr Błażejewicz <https://github.com/peterblazejewicz>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/**
+ * The fast way to check if a JS object is numeric
+ * Inspired by is-number <https://github.com/jonschlinkert/is-number>
+ * but significantly simplified and sped up by ignoring number and string constructors
+ * ie these return false:
+ *   new Number(1)
+ *   new String('1')
+ */
+declare function isNumeric(n: any): boolean;
+
+export = isNumeric;

types/fast-isnumeric/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "fast-isnumeric-tests.ts"
+    ]
+}

types/fast-isnumeric/tslint.json

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