Try to avoid querying Deno.permissions

lib/utils.js

@@ -363,8 +363,15 @@ const utils = (module.exports = {
   },
 
   getEnv(varName) {
-    if (typeof Deno === 'object' && Deno.permissions().env) {
-      return Deno.env()[varName];
+    if (typeof Deno === 'object') {
+      try {
+        return Deno.env()[varName];
+      } catch (err) {
+        // Probably a permissions error because we don't have permission to read the environment variables
+        // Unfortunately the whole permissions API is async now:
+        // https://github.com/denoland/deno/pull/3200/files
+        // ... so we can't detect whether we do have access
+      }
     } else if (typeof process === 'object' && process.env) {
       return process.env[varName];
     }