use latest browsertime beta 1 of 4.0

package-lock.json

@@ -678,9 +678,9 @@
       "integrity": "sha1-81HTKWnTL6XXpVZxVCY9korjvR8="
     },
     "browsertime": {
-      "version": "4.0.0-alpha.19",
-      "resolved": "https://registry.npmjs.org/browsertime/-/browsertime-4.0.0-alpha.19.tgz",
-      "integrity": "sha512-Uql7x1oA3NpFmBLHQKq1tgvysmrF8ZeapYTqWSiBPKD6xvoKWW6XYnB7JfS8xGoSeGJhxSL++K2YlQQUTor2ZA==",
+      "version": "4.0.0-beta.1",
+      "resolved": "https://registry.npmjs.org/browsertime/-/browsertime-4.0.0-beta.1.tgz",
+      "integrity": "sha512-Wb1y55y94TI0ezmF8LEEGtddhGlW1FF7xVNhVwy+iodg5C9Fd6t9daMgnDOF1SXqmr0w+sEyIiJgq0bKN/csFQ==",
       "requires": {
         "@cypress/xvfb": "1.2.4",
         "@sitespeed.io/chromedriver": "2.44.1",

package.json

@@ -72,7 +72,7 @@
   "main": "./lib/sitespeed.js",
   "dependencies": {
     "aws-sdk": "2.361.0",
-    "browsertime": "4.0.0-alpha.19",
+    "browsertime": "4.0.0-beta.1",
     "cli-color": "1.4.0",
     "concurrent-queue": "7.0.2",
     "dayjs-ext": "2.2.0",