Added support for Reader in blob store.

deno.json

@@ -1,10 +1,11 @@
 {
     "fmt": {
-      "lineWidth": 120,
-      "indentWidth": 4,
-      "semiColons": true,
-      "singleQuote": true,
-      "proseWrap": "preserve",
-      "include": ["src/", "test/"]
-    }
-  }
+        "lineWidth": 120,
+        "indentWidth": 4,
+        "semiColons": true,
+        "singleQuote": true,
+        "proseWrap": "preserve",
+        "include": ["src/", "test/"]
+    },
+    "importMap": "./vendor/import_map.json"
+}