feat: add detection of Promise support

Author: pizzafroide

src/promises.ts

@@ -182,7 +182,8 @@ export class FileHandle implements IFileHandle {
     }
 }
 
-export default function createPromisesApi(vol: Volume): IPromisesAPI {
+export default function createPromisesApi(vol: Volume): null | IPromisesAPI {
+    if (typeof Promise === 'undefined') return null;
     return {
         FileHandle,
 

src/volume.ts

@@ -575,6 +575,7 @@ export class Volume {
                 'ExperimentalWarning',
             );
         }
+        if (this.promisesApi === null) throw new Error('Promise is not supported in this environment.');
         return this.promisesApi;
     }