build: drop support for legacy browsers (IE11, Safari 10)

BREAKING CHANGE: Drop support for browsers that don't correctly
implement const/let and no longer transpile the browser build to ES2015.

Browser tests are run in the first supported version of each supported
browser and in the latest (as of this commit) version available on
Browserstack.

README.md

@@ -10,7 +10,7 @@ For the creation of [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) UUIDs
 - **Cross-platform** - Support for ...
   - CommonJS, [ECMAScript Modules](#ecmascript-modules) and [CDN builds](#cdn-builds)
   - Node 10, 12, 14, 16
-  - Chrome, Safari, Firefox, Edge, IE 11 browsers
+  - Chrome, Safari, Firefox, Edge browsers
   - Webpack and rollup.js module bundlers
   - [React Native / Expo](#react-native--expo)
 - **Secure** - Cryptographically-strong random values
@@ -417,6 +417,10 @@ Note: If you are using Expo, you must be using at least `react-native-get-random
 
 [In Edge <= 18, Web Crypto is not supported in Web Workers or Service Workers](https://caniuse.com/#feat=cryptography) and we are not aware of a polyfill (let us know if you find one, please).
 
+### IE 11 (Internet Explorer)
+
+Support for IE11 and other legacy browsers has been dropped as of `uuid@9`. If you need to support legacy browsers, you can always transpile the uuid module source yourself (e.g. using [Babel](https://babeljs.io/)).
+
 ## Upgrading From `uuid@7`
 
 ### Only Named Exports Supported When Using with Node.js ESM

README_js.md

@@ -25,7 +25,7 @@ For the creation of [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) UUIDs
 - **Cross-platform** - Support for ...
   - CommonJS, [ECMAScript Modules](#ecmascript-modules) and [CDN builds](#cdn-builds)
   - Node 10, 12, 14, 16
-  - Chrome, Safari, Firefox, Edge, IE 11 browsers
+  - Chrome, Safari, Firefox, Edge browsers
   - Webpack and rollup.js module bundlers
   - [React Native / Expo](#react-native--expo)
 - **Secure** - Cryptographically-strong random values
@@ -426,6 +426,10 @@ Note: If you are using Expo, you must be using at least `react-native-get-random
 
 [In Edge <= 18, Web Crypto is not supported in Web Workers or Service Workers](https://caniuse.com/#feat=cryptography) and we are not aware of a polyfill (let us know if you find one, please).
 
+### IE 11 (Internet Explorer)
+
+Support for IE11 and other legacy browsers has been dropped as of `uuid@9`. If you need to support legacy browsers, you can always transpile the uuid module source yourself (e.g. using [Babel](https://babeljs.io/)).
+
 ## Upgrading From `uuid@7`
 
 ### Only Named Exports Supported When Using with Node.js ESM

babel.config.json

@@ -6,7 +6,20 @@
       "presets": [["@babel/preset-env", { "targets": { "node": "10" }, "modules": "commonjs" }]]
     },
     "esmBrowser": {
-      "presets": [["@babel/preset-env", { "modules": false }]]
+      "presets": [
+        [
+          "@babel/preset-env",
+          {
+            "targets": {
+              "chrome": "49",
+              "edge": "14",
+              "firefox": "51",
+              "safari": "11"
+            },
+            "modules": false
+          }
+        ]
+      ]
     },
     "esmNode": {
       "presets": [["@babel/preset-env", { "targets": { "node": "10" }, "modules": false }]]

wdio.conf.js

@@ -40,20 +40,11 @@ const capabilities = [
     'bstack:options': {
       ...commonCapabilities,
       os: 'Windows',
-      osVersion: '10',
+      osVersion: '11',
     },
     browserName: 'Chrome',
     browserVersion: '92.0',
   },
-  {
-    'bstack:options': {
-      ...commonCapabilities,
-      os: 'Windows',
-      osVersion: '10',
-    },
-    browserName: 'Chrome',
-    browserVersion: '81.0',
-  },
   // Chrome 49 released on 2016-03-02 was the last version supported on Windows XP, Windows Vista, Mac OS X 10.6, 10.7, and 10.8
   {
     'bstack:options': {
@@ -66,35 +57,39 @@ const capabilities = [
   },
 
   // Firefox
+  // Latest
   {
     'bstack:options': {
       ...commonCapabilities,
       os: 'Windows',
-      osVersion: '10',
+      osVersion: '11',
     },
     browserName: 'Firefox',
-    browserVersion: '75.0',
+    browserVersion: '94.0',
   },
+  // Firefox 51 was the first Firefox to correctly support const/let
   {
     'bstack:options': {
       ...commonCapabilities,
       os: 'Windows',
       osVersion: '10',
     },
     browserName: 'Firefox',
-    browserVersion: '44.0',
+    browserVersion: '51.0',
   },
 
   // Edge
   {
     'bstack:options': {
       ...commonCapabilities,
       os: 'Windows',
-      osVersion: '10',
+      osVersion: '11',
     },
     browserName: 'Edge',
-    browserVersion: '81.0',
+    browserVersion: '96.0',
   },
+  // While Edge 12 already supported const/let, Edge 15 is the earliest Edge available on
+  // Browserstack
   {
     'bstack:options': {
       ...commonCapabilities,
@@ -110,19 +105,20 @@ const capabilities = [
     'bstack:options': {
       ...commonCapabilities,
       os: 'OS X',
-      osVersion: 'Catalina',
+      osVersion: 'Monterey',
     },
     browserName: 'Safari',
-    browserVersion: '13.0',
+    browserVersion: '15.0',
   },
+  // Safari 11 was the first Safari to correctly support const/let
   {
     'bstack:options': {
       ...commonCapabilities,
       os: 'OS X',
-      osVersion: 'Sierra',
+      osVersion: 'High Sierra',
     },
     browserName: 'Safari',
-    browserVersion: '10.0',
+    browserVersion: '11.0',
   },
 ];