fix(typescript): Update ElementContext type (#822)

* fixes 819: Correct typings for ElementContext
* Update other issues in typings to get the TS scripts pass

axe.d.ts

@@ -13,18 +13,14 @@ declare module axe {
 	type RunOnlyType = "rule" | "rules" | "tag" | "tags";
 
 	type RunOnlyObject = {
-		include?: string[],
-		exclude?: string[]
+		include?: string[] | string[][],
+		exclude?: string[] | string[][]
 	}
 
 	type RunCallback = (error: Error, results:AxeResults) => void;
 
-	interface ElementContext {
-		node?: Object,
-		selector?: string,
-		include?: any[],
-		exclude?: any[]
-	}
+	type ElementContext = Node | string | RunOnlyObject;
+
 	interface RunOnly {
 		type: RunOnlyType,
 		values?: TagValue[] | RunOnlyObject
@@ -132,7 +128,7 @@ declare module axe {
 	 * @param   {RunCallback}    callback Optional The function to invoke when analysis is complete.
 	 * @returns {Promise<AxeResults>|void} If the callback was not defined, aXe will return a Promise.
 	 */
-	function run(context: ElementContext): Promise<AxeResults>
+	function run(context?: ElementContext): Promise<AxeResults>
 	function run(options: RunOptions): Promise<AxeResults>
 	function run(callback: (error: Error, results:AxeResults) => void): void
 	function run(context: ElementContext, callback: RunCallback): void

typings/axe-core/axe-core-tests.ts

@@ -29,7 +29,7 @@ axe.run({exclude: [$fixture[0]]}, {}, (error: Error, results: axe.AxeResults) =>
 	console.log(error || results)
 })
 // additional configuration options
-axe.run(context, {iframes: false, selectors: false, elementRef: false}, 
+axe.run(context, {iframes: false, selectors: false, elementRef: false},
 		(error: Error, results: axe.AxeResults)  => {
 	console.log(error || results.passes.length);
 });
@@ -45,7 +45,7 @@ axe.run(context, tagConfig, (error: Error, results: axe.AxeResults) => {
 })
 var includeExcludeTagsRunOnly: axe.RunOnly = {
 	type: 'tags',
-	value: {
+	values: {
 		include: ['wcag2a', 'wcag2aa'],
 		exclude: ['experimental']
 	}