Drop support for Python 3.4

* Python 3.4 reached end of life on March 18, 2019.
* The ligo-gracedb unit tests do not pass under Python 3.4.

.gitlab-ci.yml

@@ -83,10 +83,6 @@ test:python2.7:
   <<: *test
   image: python:2.7
 
-test:python3.4:
-  <<: *test
-  image: python:3.4
-
 test:python3.5:
   <<: *test
   image: python:3.5

debian/control

@@ -5,7 +5,7 @@ Priority: optional
 Build-Depends: debhelper (>= 9), dh-python, python-all-dev, python3-all-dev, python-setuptools, python3-setuptools, python-six, python3-six, help2man
 Standards-Version: 3.8.4
 X-Python-Version: >=2.7
-X-Python3-Version: >=3.4
+X-Python3-Version: >=3.5
 
 Package: python-ligo-gracedb
 Architecture: all

docs/source/contributing.rst

@@ -89,7 +89,7 @@ If you want to run those tests specifically, you can do::
 Comprehensive testing
 ~~~~~~~~~~~~~~~~~~~~~
 This package includes a `configuration <https://git.ligo.org/lscsoft/gracedb-client/blob/master/tox.ini>`__ for using `tox <https://tox.readthedocs.io/>`__ to automate testing with different versions of Python.
-The current configuration uses Python 2.7 and Python 3.4-3.7, if available on your system.
+The current configuration uses Python 2.7 and Python 3.5-3.7, if available on your system.
 
 ``tox`` should already be installed from the ``requirements-dev.txt`` file.
 However, if you still need to install it, you can do so with ``pip``::

docs/source/index.rst

@@ -12,7 +12,7 @@ ligo-gracedb
 
 
 ligo-gracedb is a Python package which provides tools for accessing the API of the **Gra**\ vitational-wave **C**\ andidate **E**\ vent **D**\ ata\ **b**\ ase (|gracedb|_).
-It is compatible with Python 2.7, 3.4, 3.5, 3.6, and 3.7.
+It is compatible with Python 2.7, 3.5, 3.6, and 3.7.
 
 ligo-gracedb provides functionality which allows users to do the following:
 

setup.py

@@ -69,7 +69,6 @@ CLASSIFIERS = [
     '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',

tox.ini

 [tox]
-envlist = {py27,py34,py35,py36,py37}-{unit_test,integration_test}
+envlist = {py27,py35,py36,py37}-{unit_test,integration_test}
 skip_missing_interpreters = True
 
 [testenv]