Remove safari from supported browsers (#2272)

* Update README.md

* Update package.json

* Update obsoleteHTMLTemplate.html

* remove unneeded polyfills

* explicit deny safari

* remove from webpack and update lock

Co-authored-by: Seve Badajoz <sbadajoz@chanzuckerberg.com>

client/configuration/eslint/eslint.js

@@ -10,15 +10,9 @@ module.exports = {
     "prettier",
   ],
   settings: {
-    polyfills: [
-      "TextDecoder",
-      "TextEncoder",
-      "fetch",
-      "Request",
-      "Response",
-      "Headers",
-      "AbortController",
-    ],
+    // AbortController is not supported in iOS Safari 10.3, Chrome 61
+    // Headers is not supported in iOS Safari 10.3
+    polyfills: ["Headers", "AbortController"],
   },
   env: { browser: true, commonjs: true, es6: true },
   globals: {

client/configuration/webpack/obsoleteHTMLTemplate.html

@@ -56,13 +56,6 @@
         />
         <div>Chrome &gt; 60</div>
       </a>
-      <a href="https://www.apple.com/safari/" aria-label="Download Safari">
-        <img
-          src="https://cellxgene.cziscience.com/s3/cellxgene/static/images/safari.png"
-          style="width: 80px; height: 80px;"
-        />
-        <div>Safari ≥ 10.1</div>
-      </a>
       <a href="https://www.mozilla.com/firefox/" aria-label="Download Firefox">
         <img
           src="https://cellxgene.cziscience.com/s3/cellxgene/static/images/firefox.png"

client/configuration/webpack/webpack.config.shared.js

@@ -2,6 +2,7 @@ const path = require("path");
 const fs = require("fs");
 const MiniCssExtractPlugin = require("mini-css-extract-plugin");
 const ObsoleteWebpackPlugin = require("obsolete-webpack-plugin");
+// eslint-disable-next-line @blueprintjs/classes-constants -- incorrect match
 const ScriptExtHtmlWebpackPlugin = require("script-ext-html-webpack-plugin");
 
 const src = path.resolve("src");
@@ -20,7 +21,6 @@ module.exports = {
   entry: [
     "core-js",
     "regenerator-runtime/runtime",
-    "fastestsmallesttextencoderdecoder",
     "whatwg-fetch",
     "abort-controller/polyfill",
     "./src/index",