Add Python 3.8 to tests and drop Python 2.7 and 3.4 support

.travis.yml

@@ -4,11 +4,10 @@ os:
   # - osx
 language: python
 python:
+  - "3.8"
   - "3.7"
   - "3.6"
   - "3.5"
-  - "3.4"
-  - "2.7"
   - "pypy"
   - "pypy3"
 jobs:
@@ -18,6 +17,9 @@ jobs:
       env: TOXENV=pep8
 
     # test setup.py using each tested version
+    - python: 3.8
+      env: TOXENV=setup38
+
     - python: 3.7
       env: TOXENV=setup37
 
@@ -27,19 +29,10 @@ jobs:
     - python: 3.5
       env: TOXENV=setup35
 
-    - python: 3.4
-      env: TOXENV=setup34
-
-    - python: 2.7
-      env: TOXENV=setup27
-
     # do some tests with LC_ALL=C to check for locale variance
     - python: 3.6
       env: LC_ALL=C
 
-    - python: 2.7
-      env: LC_ALL=C
-
   allow_failures:
     # pep8 failures shouldn't be considered fatal
     - env: TOXENV=pep8
@@ -53,8 +46,8 @@ jobs:
 install:
   - sed -i -e 's/^/#/' tests/gnupghome/gpg-agent.conf
   - ./install_dependencies.${TRAVIS_OS_NAME}.sh
-  # ensure tox and coveralls are installed. pin PyYAML until we drop Python 3.4
-  - pip install tox python-coveralls 'PyYAML==5.2; python_version == "3.4"'
+  # ensure tox and coveralls are installed
+  - pip install tox python-coveralls
 
 # set TOXENV if it isn't yet
 before_script:

pgpy/_author.py

@@ -15,4 +15,4 @@ __all__ = ['__author__',
 __author__ = "Michael Greene"
 __copyright__ = "Copyright (c) 2014-2019 Security Innovation, Inc"
 __license__ = "BSD"
-__version__ = str(LooseVersion("0.5.3"))
+__version__ = str(LooseVersion("0.6.0-alpha"))

requirements.txt

@@ -1,5 +1,3 @@
 cryptography>=2.6
-enum34; python_version < '3.4'
 pyasn1
 six>=1.9.0
-singledispatch; python_version < '3.4'

setup.cfg

@@ -15,11 +15,10 @@ classifiers =
     Operating System :: Microsoft :: Windows
     Intended Audience :: Developers
     Programming Language :: Python
+    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.5
-    Programming Language :: Python :: 3.4
-    Programming Language :: Python :: 2.7
     Programming Language :: Python :: Implementation :: CPython
     Topic :: Security
     Topic :: Security :: Cryptography
@@ -36,12 +35,10 @@ install_requires =
     cryptography>=2.6
     pyasn1
     six>=1.9.0
-    singledispatch; python_version < '3.4'
-    enum34; python_version < '3.4'
 setup_requires =
     setuptools
     wheel
-python_requires = >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
+python_requires = >=3.5
 
 # doc_requires =
 #    sphinx

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = pypy, pypy3, py27, py34, py35, py36, py37, pep8, setup37, setup36, setup35, setup34, setup27
+envlist = pypy, pypy3, py35, py36, py37, py38, pep8, setup38, setup37, setup36, setup35
 skipsdist = True
 
 [pytest]
@@ -18,11 +18,9 @@ max-line-length = 160
 passenv = HOME ARCHFLAGS LDFLAGS CFLAGS INCLUDE LIB LD_LIBRARY_PATH PATH
 deps =
     cryptography>=2.6
-    enum34
     gpg==1.10.0
     pyasn1
     six>=1.9.0
-    singledispatch
     pytest
     pytest-cov
     pytest-ordering
@@ -38,6 +36,13 @@ commands =
     pip install -e .
     rm -rf PGPy.egg-info
 
+[testenv:setup38]
+recreate = True
+basepython = python3.7
+whitelist_externals = {[test-setup]whitelist_externals}
+deps =
+commands = {[test-setup]commands}
+
 [testenv:setup37]
 recreate = True
 basepython = python3.7
@@ -59,20 +64,6 @@ whitelist_externals = {[test-setup]whitelist_externals}
 deps =
 commands = {[test-setup]commands}
 
-[testenv:setup34]
-recreate = True
-basepython = python3.4
-whitelist_externals = {[test-setup]whitelist_externals}
-deps =
-commands = {[test-setup]commands}
-
-[testenv:setup27]
-recreate = True
-deps = pip
-basepython = python2.7
-whitelist_externals = {[test-setup]whitelist_externals}
-commands = {[test-setup]commands}
-
 [testenv:pep8]
 basepython = python3.6
 deps =