change order of ci jobs

Author: emmanuelle

.circleci/config.yml

@@ -79,6 +79,38 @@ jobs:
           command: 'cd packages/python/plotly; tox -e py37-core'
           no_output_timeout: 20m
 
+  python-3.7-percy:
+    docker:
+      - image: circleci/python:3.7-stretch-node-browsers
+
+    environment:
+          PERCY_ENABLED: True
+          PERCY_PROJECT: plotly/plotly.py
+
+    steps:
+      - checkout
+      - run:
+          name: Inject Percy Environment variables
+          command: |
+            echo 'export PERCY_TOKEN="$PERCY_PYTHON_TOKEN_V0"' >> $BASH_ENV
+
+      - run:
+          name: Install requirements
+          command: |
+            pip install -e ./packages/python/plotly
+
+      - run:
+          name: Build html figures
+          command: |
+            python tests/percy/plotly.express.py
+
+      - run:
+          name: Run percy snapshots
+          command: |
+            npx percy snapshot tests/percy/
+            rm tests/percy/*.html
+
+
   # Optional
   python-2.7-optional:
     docker:
@@ -160,37 +192,6 @@ jobs:
           command: 'cd packages/python/plotly; tox -e py37-optional'
           no_output_timeout: 20m
 
-  python-3.7-percy:
-    docker:
-      - image: circleci/python:3.7-stretch-node-browsers
-
-    environment:
-          PERCY_ENABLED: True
-          PERCY_PROJECT: plotly/plotly.py
-
-    steps:
-      - checkout
-      - run:
-          name: Inject Percy Environment variables
-          command: |
-            echo 'export PERCY_TOKEN="$PERCY_PYTHON_TOKEN_V0"' >> $BASH_ENV
-
-      - run:
-          name: Install requirements
-          command: |
-            pip install -e ./packages/python/plotly
-
-      - run:
-          name: Build html figures
-          command: |
-            python tests/percy/plotly.express.py
-
-      - run:
-          name: Run percy snapshots
-          command: |
-            npx percy snapshot tests/percy/
-            rm tests/percy/*.html
-
   # Plot.ly
   python-2.7-plot_ly:
     docker: