Attempt to provide custom type mappings for remap-istanbul

Attempt to provide custom type mappings for remap-istanbul, inspired by:
SitePen/remap-istanbul#155 (comment)

src/types/remap-istanbul/index.d.ts

@@ -0,0 +1,41 @@
+declare module 'remap-istanbul' {
+	namespace RemapIstanbul {
+		export interface Options {
+			fail?: boolean;
+			check?: CheckOptions;
+			reportOpts?: {};
+			reports?: {};
+		}
+
+		export interface CheckOptions {
+			global?: Thresholds;
+			each?: EachThresholds;
+		}
+
+		export interface Thresholds {
+			statements: Number;
+			branches: Number;
+			lines: Number;
+			functions: Number;
+			excludes: string[];
+		}
+
+		export interface EachThresholds extends Thresholds {
+			overrides?: {};
+		}
+	}
+
+	export default class {
+		/**
+		  * The basic API for utilising remap-istanbul
+		  * @param {Array|string} sources The sources that could be consumed and remapped.
+		  *		For muliple sources to be combined together, provide
+		  *		an array of strings.
+		  * @param  {Object} reports An object where each key is the report type required and the value
+		  *		is the destination for the report.
+		  * @param {Object} reportOptions? An object containing the report options.
+		  * @return {Promise} A promise that will resolve when all the reports are written.
+		  */
+		public remap(sources: [], reports: object, reportOptions: RemapIstanbul.Options): any;
+	}
+}

tsconfig.json

@@ -9,11 +9,12 @@
 		],
 		"sourceMap": true,
 		"rootDir": "src",
-		"strict": true   /* enable all strict type-checking options */
+		"strict": true,   /* enable all strict type-checking options */
 		/* Additional Checks */
 		// "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
 		// "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
 		// "noUnusedParameters": true,  /* Report errors on unused parameters. */
+		"typeRoots": ["./src/types", "./node_modules/@types"]
 	},
 	"exclude": [
 		"node_modules",