Add py3.8 to the test matrix

.travis.yml

@@ -19,6 +19,8 @@ matrix:
       python: "3.6"
     - os: linux
       python: "3.7"
+    - os: linux
+      python: "3.8"
 
 install:
     - if [ "$TRAVIS_OS_NAME" = "windows" ]; then
@@ -29,6 +31,11 @@ install:
       elif [ "$TRAVIS_PYTHON_VERSION" = "pypy3.5" ]; then
         pip install -U click h11 wsproto==0.13.*;
         pip install -U autoflake codecov isort pytest pytest-cov requests;
+      elif [ "$TRAVIS_PYTHON_VERSION" = "3.8" ]; then
+        pip install -U Cython;
+        pip install -U git+https://github.com/MagicStack/uvloop.git@1eb6727437430fe0500d7f044dd6e4432abd0901;
+        pip install -U click h11 httptools websockets==8.* wsproto==0.13.*;
+        pip install -U autoflake black codecov isort pytest pytest-cov requests;
       else
         pip install -U -r requirements.txt;
       fi;