Merge pull request #544 from frazar/ci-update-to-python3-and-bionic

Update CI to Python 3 and Ubuntu 18.04 LTS

Author: terrillmoore

.travis.yml

@@ -14,7 +14,7 @@
 ##############################################################################
 
 language: c
-dist: trusty
+dist: bionic
 sudo: true
 
 env:
@@ -35,10 +35,12 @@ before_install:
   #
   # PlatformIO setup
   - uname --all
-  - sudo apt-get update -qq && sudo apt-get -y install python-pip
-  - python2 --version
-  - pip2 --version
-  - pip2 install --user --upgrade platformio
+  - sudo apt-get update -qq && sudo apt-get -y install python3-pip
+  - python3 --version
+  - pip3 install --user --upgrade pip
+  - pip3 --version
+  - pip3 install --user --upgrade setuptools
+  - pip3 install --user --upgrade platformio
   - platformio update
   - platformio --version
   #