fix An implementation cannot be declared in ambient contexts

Signed-off-by: Fabio José <fabiojose@gmail.com>

package.json

@@ -46,7 +46,8 @@
     "mocha": "5.2.0",
     "mocha-lcov-reporter": "1.3.0",
     "nock": "10.0.2",
-    "request": "^2.88.0"
+    "request": "^2.88.0",
+    "typescript": "^3.6.4"
   },
   "publishConfig": {
     "access": "public"

v1/index.d.ts

@@ -1,5 +1,3 @@
-import * as v1js from './index.js'
-
 /**
  * CloudEvent class definition
  */
@@ -24,8 +22,6 @@ export interface Spec {
 /**
  * Function to create CloudEvents instances
  */
-export function event(): Cloudevent {
-  return new Cloudevent();
-}
+export type event = () => Cloudevent;
 
 export default Cloudevent;