style(lint): fix lint errors

packages/core/package-lock.json

@@ -10593,9 +10593,9 @@
       }
     },
     "tslint-ionic-rules": {
-      "version": "0.0.12",
-      "resolved": "https://registry.npmjs.org/tslint-ionic-rules/-/tslint-ionic-rules-0.0.12.tgz",
-      "integrity": "sha512-CPihu6XsjinOW++UbnNrXXUi2doHtGdT00v6/v6lVY3YVujqtX/Dtbvr2s+A3Vj06Q/MliBBWV8uysabxlL1NQ==",
+      "version": "0.0.13",
+      "resolved": "https://registry.npmjs.org/tslint-ionic-rules/-/tslint-ionic-rules-0.0.13.tgz",
+      "integrity": "sha512-wBQbKjLlazwTW9Ql2sZYdZ04cPYCaHSdo8PuJy9Ke9d4ewyjCRweJ8AB0OKtk3MtSuNiJJumnJJYUgNGuNjevg==",
       "dev": true,
       "requires": {
         "tslint-eslint-rules": "4.1.1"

packages/core/package.json

@@ -28,7 +28,7 @@
     "sass-lint": "^1.12.1",
     "selenium-webdriver": "^3.6.0",
     "tslint": "^5.8.0",
-    "tslint-ionic-rules": "0.0.12",
+    "tslint-ionic-rules": "0.0.13",
     "yargs": "^10.0.3"
   },
   "scripts": {

packages/core/src/global/events.ts

@@ -26,7 +26,7 @@ export class Events {
    * @return true if a handler was removed
    */
   unsubscribe(topic: string, handler: Function = null) {
-    let t = this.c[topic];
+    const t = this.c[topic];
     if (!t) {
       // Wasn't found, wasn't removed
       return false;
@@ -39,7 +39,7 @@ export class Events {
     }
 
     // We need to find and remove a specific handler
-    let i = t.indexOf(handler);
+    const i = t.indexOf(handler);
 
     if (i < 0) {
       // Wasn't found, wasn't removed
@@ -63,12 +63,12 @@ export class Events {
    * @param {any} eventData the data to send as the event
    */
   publish(topic: string, ...args: any[]) {
-    var t = this.c[topic];
+    const t = this.c[topic];
     if (!t) {
       return null;
     }
 
-    let responses: any[] = [];
+    const responses: any[] = [];
     t.forEach((handler: any) => {
       responses.push(handler(...args));
     });

packages/core/tsconfig.json

@@ -1,7 +1,8 @@
 {
   "compilerOptions": {
-    "allowUnreachableCode": false,
     "alwaysStrict": true,
+    "allowSyntheticDefaultImports": true,
+    "allowUnreachableCode": false,
     "declaration": true,
     "experimentalDecorators": true,
     "forceConsistentCasingInFileNames": true,
@@ -9,7 +10,7 @@
     "jsxFactory": "h",
     "lib": [
       "dom",
-      "es2015"
+      "es2017"
     ],
     "module": "es2015",
     "moduleResolution": "node",