update example to use latest mea release

Author: Matt Sokoloff

examples/model_assisted_labeling/image_mea.ipynb

@@ -29,7 +29,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "!pip install labelbox==2.6b2 \\\n",
+    "!pip install labelbox==2.7b0 \\\n",
     "             requests \\\n",
     "             ndjson \\\n",
     "             scikit-image \\\n",
@@ -449,4 +449,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 5
-}
+}