feat(store): add runtime check for action type uniqueness (#2520)

Author: timdeschryver

modules/effects/spec/types/utils.ts

@@ -1,6 +1,6 @@
 export const compilerOptions = () => ({
   moduleResolution: 'node',
-  target: 'es2015',
+  target: 'es2017',
   baseUrl: '.',
   experimentalDecorators: true,
   paths: {

modules/router-store/spec/types/utils.ts

@@ -1,6 +1,6 @@
 export const compilerOptions = () => ({
   moduleResolution: 'node',
-  target: 'es2015',
+  target: 'es2017',
   baseUrl: '.',
   experimentalDecorators: true,
   paths: {