chore: update types (#396)

Author: yoyoys

package.json

@@ -85,5 +85,6 @@
   "repository": {
     "type": "git",
     "url": "git+https://github.com/Akryum/vue-tooltip.git"
-  }
+  },
+  "typings": "types/index.d.ts"
 }

types/index.d.ts

@@ -0,0 +1,8 @@
+import Vue, { VueConstructor, DirectiveOptions, PluginFunction } from 'vue';
+
+const vToolTip: PluginFunction<any>;
+export default vToolTip;
+
+export const VPopover: VueConstructor<Vue>;
+export const VClosePopover: DirectiveOptions;
+export const VTooltip: DirectiveOptions;