Drop support for EOL Pythons 2.7, 3.4, & 3.5

3.5 isn't actually EOL for another few months, but dropping support now
anyway for CI testing.

Signed-off-by: Andrew MacDonald <andrew@maccas.net>

.travis.yml

@@ -1,9 +1,8 @@
 language: python
 python:
-    - "2.7"
-    - "3.4"
-    - "3.5"
     - "3.6"
+    - "3.7"
+    - "3.8"
 # Work around travis ci shallow clone not working with conda build
 git:
   depth: 99999

README.rst

@@ -21,8 +21,8 @@ software, and includes an evaluation between InfluxDB, PhilDB, and SciDB.
 Dependencies
 ------------
 
-Requires Python 2.7 or greater (mostly tested with Python 2.7 and Python 3.5 on Mac OSX and Linux).
-Test suite runs on Linux using Travis CI with Python 2.7, 3.4, 3.5, and 3.6.
+Requires Python 3.7 or greater (mostly tested on Mac OSX and Linux).
+Test suite runs on Linux using Travis CI with Python 3.6, 3.7, and 3.8.
 Test suite runs on Windows using Appveyor with Python 3.4.
 
 All the python dependencies are recorded in the python\_requirements

setup.py

@@ -45,11 +45,9 @@
         "Topic :: Software Development :: Build Tools",
         "Topic :: Software Development :: Libraries :: Python Modules",
         "License :: OSI Approved :: BSD License",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
     ],
 )