Dropped CI Python v3.4 testing (accomodates PyYAML v5.3)

.travis.yml

@@ -4,8 +4,6 @@ dist: xenial
 
 matrix:
   include:
-    - python: "3.4"
-      env: TOXENV=py34
     - python: "3.5"
       env: TOXENV=py35
     - python: "3.6"

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py34,py35,py36,py37,pypy3,coverage-report
+envlist = py35,py36,py37,pypy3,coverage-report
 skipsdist = true
 
 [testenv]
@@ -14,14 +14,6 @@ commands =
     coverage run --parallel -m pytest {posargs} apprise_api
     flake8 apprise_api --count --show-source --statistics
 
-[testenv:py34]
-deps=
-   -r{toxinidir}/requirements.txt
-   -r{toxinidir}/dev-requirements.txt
-commands =
-    coverage run --parallel -m pytest {posargs} apprise_api
-    flake8 apprise_api --count --show-source --statistics
-
 [testenv:py35]
 deps=
    -r{toxinidir}/requirements.txt