Changed to es2017

alexandermbrown · alexandermbrown · commit 95b9bab3eda6 · 2019-10-21T18:21:56.000+08:00
diff --git a/tsconfig.json b/tsconfig.json
@@ -2,7 +2,7 @@
     "compilerOptions": {
         "module": "commonjs",
         "target": "es6",
-        "lib": [ "es2015", "dom" ],
+        "lib": [ "es2017", "dom" ],
         "outDir": "./dist",
         "noImplicitAny": true,
         "downlevelIteration": true,
