Add python 3.8 and 3.7. Remove python 3.3 from testing

.travis.yml

@@ -1,16 +1,18 @@
 language: python
 matrix:
   include:
+    - python: 3.8
+      env: TOX_ENV=py38
+    - python: 3.7
+      env: TOX_ENV=py37
     - python: 3.6
       env: TOX_ENV=py36
-    - python: 2.7
-      env: TOX_ENV=py27
     - python: 3.5
       env: TOX_ENV=py35
     - python: 3.4
       env: TOX_ENV=py34
-    - python: 3.3
-      env: TOX_ENV=py33
+    - python: 2.7
+      env: TOX_ENV=py27
 install:
   - pip install -r requirements.txt
   - pip install -r requirements-dev.txt

setup.py

@@ -17,7 +17,11 @@
     download_url="https://github.com/chrisgilmerproj/brewday/tarball/{}".format(
         VERSION
     ),  # noqa
-    packages=find_packages(exclude=["*.tests", "*.tests.*", "tests.*", "tests"]),
+    packages=find_packages(exclude=[
+        "*.tests",
+        "*.tests.*",
+        "tests.*",
+        "tests"]),
     entry_points={
         "console_scripts": [
             "abv = brew.cli.abv:main",
@@ -49,10 +53,11 @@
         "Programming Language :: Python :: 2",
         "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.3",
         "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",
         "Topic :: Software Development :: Libraries :: Python Modules",
     ],
 )

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py36,py27,py35,py34,py33
+envlist = py38,py37,py36,py35,py34,py27
 
 [testenv]
 passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH