Use pip3 on CircleCI.

Author: sir-sigurd

.circleci/config.yml

@@ -5,7 +5,7 @@ jobs:
     docker:
       - image: ubuntu:16.04
     steps:
-      - run: apt-get update && apt-get install -y python2.7-dev python3.5-dev python-pip sqlite3 ruby-dev npm
+      - run: apt-get update && apt-get install -y python2.7-dev python3.5-dev python3-pip sqlite3 ruby-dev npm
       - run: ln -s /usr/bin/nodejs /usr/local/bin/node
       - run: npm install -g coffee-script@1.7.1
       - run: npm install -g livescript@1.4.0
@@ -16,8 +16,8 @@ jobs:
       - run: gem install sass -v 3.4.22
       - run: gem install compass -v 1.0.1
       - checkout
-      - run: pip install -r requirements-ci.txt
-      - run: pip install -e .[libsass]
+      - run: pip3 install -r requirements-ci.txt
+      - run: pip3 install -e .[libsass]
       - run: flake8
       - run: rm -f coverage.xml
       - run: tox