revert eslint ES version changes; add globalThis & navigator exceptions

Author: alxndrsn

.eslintrc

@@ -4,11 +4,12 @@
   "extends": ["eslint:recommended", "plugin:prettier/recommended", "prettier"],
   "ignorePatterns": ["node_modules", "coverage", "packages/pg-protocol/dist/**/*", "packages/pg-query-stream/dist/**/*"],
   "parserOptions": {
+    "ecmaVersion": 2017,
     "sourceType": "module"
   },
   "env": {
     "node": true,
-    "es2020": true,
+    "es6": true,
     "mocha": true
   },
   "rules": {

packages/pg/lib/crypto/utils-webcrypto.js

@@ -14,6 +14,7 @@ module.exports = {
  * The Web Crypto API - grabbed from the Node.js library or the global
  * @type Crypto
  */
+// eslint-disable-next-line no-undef
 const webCrypto = nodeCrypto.webcrypto || globalThis.crypto
 /**
  * The SubtleCrypto API for low level crypto operations.

packages/pg/lib/stream.js

@@ -60,12 +60,10 @@ function getCloudflareStreamFuncs() {
 function isCloudflareRuntime() {
   // Since 2022-03-21 the `global_navigator` compatibility flag is on for Cloudflare Workers
   // which means that `navigator.userAgent` will be defined.
-  if (
-    typeof globalThis.navigator === 'object' &&
-    globalThis.navigator !== null &&
-    typeof globalThis.navigator.userAgent === 'string'
-  ) {
-    return globalThis.navigator.userAgent === 'Cloudflare-Workers'
+  // eslint-disable-next-line no-undef
+  if (typeof navigator === 'object' && navigator !== null && typeof navigator.userAgent === 'string') {
+    // eslint-disable-next-line no-undef
+    return navigator.userAgent === 'Cloudflare-Workers'
   }
   // In case `navigator` or `navigator.userAgent` is not defined then try a more sneaky approach
   if (typeof Response === 'function') {