Move tests with Julia 1.0 and nightly to GitHub Actions (#405)

Author: tkf

.github/workflows/main.yml

@@ -18,7 +18,7 @@ jobs:
           - windows-latest
         architecture: [x64, x86]
         python-version: ['3.7', '3.8']
-        julia-version: ['1.3', '~1.5.0-rc1']
+        julia-version: ['1.0', '1.3', '~1.5.0-rc1', 'nightly']
         exclude:
           - os: ubuntu-latest
             architecture: x86
@@ -28,6 +28,10 @@ jobs:
             julia-version: '1.3'
           - os: windows-latest
             julia-version: '1.3'
+          - os: macos-latest
+            julia-version: 'nightly'
+          - os: windows-latest
+            julia-version: 'nightly'
       fail-fast: false
     name: Test ${{ matrix.os }} ${{ matrix.architecture }}
       Python ${{ matrix.python-version }}

.travis.yml

@@ -6,9 +6,7 @@ python:
   - "3.6"
 env:
   matrix:
-    - JULIA_VERSION=1.0
     - JULIA_VERSION=1.4
-    - JULIA_VERSION=nightly
   global:
     - TOXENV=py
     - PYJULIA_TEST_INCOMPATIBLE_PYTHONS=/usr/bin/python2