fix: Export the Options interface (#85)

Export the Options interface so developers can define a constant of type Options.

Author: cshouts-tasc

src/index.ts

@@ -17,7 +17,7 @@ declare global {
 	}
 }
 
-interface Options extends axe.RunOptions {
+export interface Options extends axe.RunOptions {
 	includedImpacts?: string[];
 }