fix linter errors

Author: James Lees

src/base-client.js

@@ -1,4 +1,5 @@
 import doRequest from './do-request';
+import { version as sdkVersion } from '../package.json';
 
 const INTERESTS_REGEX = new RegExp('^(_|\\-|=|@|,|\\.|;|[A-Z]|[a-z]|[0-9])*$');
 const MAX_INTEREST_LENGTH = 164;
@@ -14,7 +15,7 @@ export const RegistrationState = Object.freeze({
 });
 
 export default class BaseClient {
-  constructor(config) {}
+  constructor(_) {}
 
   async getDeviceId() {
     await this._resolveSDKState();
@@ -195,7 +196,6 @@ export default class BaseClient {
     const response = await doRequest(options);
     return response.id;
   }
-
 }
 
 function validateInterestName(interest) {

src/safari-client.js

@@ -79,7 +79,7 @@ export class SafariClient extends BaseClient {
   }
 
   _requestPermission() {
-    return new Promise((resolve) => {
+    return new Promise(resolve => {
       window.safari.pushNotification.requestPermission(
         __url,
         __pushId,
@@ -94,7 +94,7 @@ export class SafariClient extends BaseClient {
       return this;
     }
 
-    let { deviceToken, permission } = getPermission(__pushId);
+    let { permission } = getPermission(__pushId);
 
     if (permission === 'default') {
       console.debug('permission is default, requesting permission');
@@ -209,6 +209,10 @@ export class SafariClient extends BaseClient {
   }
 }
 
+function isSupportedBrowser() {
+  return isSupportedVersion();
+}
+
 function isSupportedVersion() {
   return 'safari' in window && 'pushNotification' in window.safari;
 }

src/web-push-client.js

@@ -261,8 +261,8 @@ export class WebPushClient extends BaseClient {
 
   async _clearPushToken() {
     return navigator.serviceWorker.ready
-      .then((reg) => reg.pushManager.getSubscription())
-      .then((sub) => {
+      .then(reg => reg.pushManager.getSubscription())
+      .then(sub => {
         if (sub) sub.unsubscribe();
       });
   }
@@ -289,7 +289,7 @@ async function getServiceWorkerRegistration() {
 function getWebPushToken(swReg) {
   return swReg.pushManager
     .getSubscription()
-    .then((sub) => (!sub ? null : encodeSubscription(sub)));
+    .then(sub => (!sub ? null : encodeSubscription(sub)));
 }
 
 function encodeSubscription(sub) {
@@ -300,7 +300,7 @@ function urlBase64ToUInt8Array(base64String) {
   const padding = '='.repeat((4 - (base64String.length % 4)) % 4);
   const base64 = (base64String + padding).replace(/-/g, '+').replace(/_/g, '/');
   const rawData = window.atob(base64);
-  return Uint8Array.from([...rawData].map((char) => char.charCodeAt(0)));
+  return Uint8Array.from([...rawData].map(char => char.charCodeAt(0)));
 }
 
 /**