Detect browsers in a Deno-compatible way (#821)

src/utils/getEnvironment.js

@@ -7,7 +7,7 @@ module.exports = (key) => {
     env.type = 'webworker';
   } else if (isElectron()) {
     env.type = 'electron';
-  } else if (typeof window === 'object') {
+  } else if (typeof document === 'object') {
     env.type = 'browser';
   } else if (typeof process === 'object' && typeof require === 'function') {
     env.type = 'node';