port to Python3: add python3 targets to .travis.yml

Added supported Python 3 versions to the Travis CI configuration.

Signed-off-by: Ed Bartosh <[email protected]>

Author: Ed Bartosh

.travis.yml

@@ -2,14 +2,13 @@ language: python
 python:
   - "2.6"
   - "2.7"
-# bmap-tools don't support 3.x yet, thus disable.
-# pypy 2.x currently also disabled, until testing fixed.
-#  - "3.2"
-#  - "3.3"
-#  - "3.4"
-#  - "3.5"
-#  - "3.5-dev" # 3.5 development branch
-#  - "nightly" # currently points to 3.6-dev
+  - "3.3"
+  - "3.4"
+  - "3.5"
+  - "3.6"
+  - "3.7-dev" # 3.7 development branch
+  - "nightly" # currently points to 3.6-dev
+# pypy 2.x currently disabled, until testing fixed.
 #  - "pypy"
 #  - "pypy3"
 # command to install dependencies