docs/tests: remove python 3.4, use 3.8 and nightly for travis-ci

Python 3.4 has reached end-of-life.
https://www.python.org/downloads/release/python-3410/

.travis.yml

@@ -11,18 +11,14 @@ git:
 matrix:
   include:
   - python: '2.7'
-  - python: '3.4'
   - python: '3.5'
     env: BUILD_DOCS=yes BUILD_INSTALLER=yes BUILD_SDIST=yes DEPLOY_PYPI=yes
   - python: '3.6'
   - python: '3.7'
-    dist: xenial
+  - python: '3.8'
-    sudo: true
+  - python: 'nightly'
-  - python: '3.8-dev'
-    dist: xenial
-    sudo: true
   allow_failures:
-  - python: '3.8-dev'
+  - python: 'nightly'
 
 before_install:
   - pip install --disable-pip-version-check --upgrade pip setuptools

appveyor.yml

@@ -2,12 +2,10 @@ environment:
 
   matrix:
     - PYTHON: "C:\\Python27"
-    - PYTHON: "C:\\Python34"
     - PYTHON: "C:\\Python35"
     - PYTHON: "C:\\Python36"
     - PYTHON: "C:\\Python37"
     - PYTHON: "C:\\Python27-x64"
-    - PYTHON: "C:\\Python34-x64"
     - PYTHON: "C:\\Python35-x64"
     - PYTHON: "C:\\Python36-x64"
     - PYTHON: "C:\\Python37-x64"

docs/install.rst

@@ -279,23 +279,22 @@ To install Streamlink from source you will need these dependencies.
 ==================================== ===========================================
 Name                                 Notes
 ==================================== ===========================================
-`Python`_                            At least version **2.7** or **3.4**.
+`Python`_                            At least version **2.7** or **3.5**.
 `python-setuptools`_
 
 **Automatically installed by the setup script**
 --------------------------------------------------------------------------------
-`python-argparse`_                   Only needed on Python versions older than **2.7**.
+`python-futures`_                    Only needed on Python **2.7**.
-`python-futures`_                    Only needed on Python **2.x**.
+`python-requests`_                   At least version **2.21.0**.
-`python-requests`_                   At least version **1.0**.
+`python-singledispatch`_             Only needed on Python **2.7**.
-`python-singledispatch`_             Only needed on Python versions older than **3.4**.
 `pycryptodome`_                      Required to play some encrypted streams
 `iso-639`_                           Used for localization settings, provides language information
 `iso3166`_                           Used for localization settings, provides country information
 `isodate`_                           Used for MPEG-DASH streams
 `PySocks`_                           Used for SOCKS Proxies
 `websocket-client`_                  Used for some plugins
-`shutil_get_terminal_size`_          Only needed on Python versions older than **3.3**
+`shutil_get_terminal_size`_          Only needed on Python **2.7**.
-`shutil_which`_                      Only needed on Python versions older than **3.3**
+`shutil_which`_                      Only needed on Python **2.7**.
 
 **Optional**
 --------------------------------------------------------------------------------
@@ -317,7 +316,6 @@ With these two environment variables it is possible to use `pycrypto`_ instead o
 
 .. _Python: https://www.python.org/
 .. _python-setuptools: https://pypi.org/project/setuptools/
-.. _python-argparse: https://pypi.org/project/argparse/
 .. _python-futures: https://pypi.org/project/futures/
 .. _python-requests: http://python-requests.org/
 .. _python-singledispatch: https://pypi.org/project/singledispatch/

setup.py

@@ -97,7 +97,7 @@ setup(name="streamlink",
       entry_points=entry_points,
       install_requires=deps,
       test_suite="tests",
-      python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4",
+      python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4",
       classifiers=["Development Status :: 5 - Production/Stable",
                    "License :: OSI Approved :: BSD License",
                    "Environment :: Console",
@@ -106,10 +106,10 @@ setup(name="streamlink",
                    "Operating System :: Microsoft :: Windows",
                    "Operating System :: MacOS",
                    "Programming Language :: Python :: 2.7",
-                   "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 :: Internet :: WWW/HTTP",
                    "Topic :: Multimedia :: Sound/Audio",
                    "Topic :: Multimedia :: Video",