fix: signal to webpack that there's no side effects (#757)

* fix: signal to webpack that there's no side effects

* chore: oooopsie

* chore: typo

Author: stipsan

.circleci/config.yml

@@ -54,7 +54,7 @@ jobs:
 
   Semantic Release:
     docker:
-      - image: circleci/node:8
+      - image: circleci/node:12
     steps:
       - checkout
       - restore-cache: *restore-cache

package.json

@@ -163,5 +163,6 @@
       "@semantic-release/npm"
     ]
   },
-  "typings": "typings/index.d.ts"
+  "typings": "typings/index.d.ts",
+  "sideEffects": false
 }