fixup! Build: ESLint setup improvements

Author: mgol

.eslintrc-browser.json

@@ -10,6 +10,13 @@
 		"ecmaVersion": 3
 	},
 
+	// The browser env is not enabled on purpose so that code takes
+	// all browser-only globals from window instead of assuming
+	// they're available as globals. This makes it possible to use
+	// jQuery with tools like jsdom which provide a custom window
+	// implementation.
+	"env": {},
+
 	"globals": {
 		"window": true,
 		"jQuery": true,

test/.eslintrc.json

@@ -4,6 +4,9 @@
 	"extends": "../.eslintrc-browser.json",
 
 	"env": {
+
+		// In source the browser env is not enabled but unit tests rely on them
+		// too much and we don't run them in non-browser environments anyway.
 		"browser": true
 	},