Fix and Optimize Workflows (#61)

* Update macos to use latest version.

* Downgrade ubuntu to use 20.04

* Fix duplicated runs

* Fix dot instead of minus

Author: pvk-developer

.github/workflows/integration.yml

@@ -1,16 +1,17 @@
 name: Integration Tests
 
 on:
-  - push
-  - pull_request
+  push:
+  pull_request:
+    types: [opened, reopened]
 
 jobs:
   unit:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         python-version: [3.6, 3.7, 3.8, 3.9]
-        os: [ubuntu-latest, macos-10.15, windows-latest]
+        os: [ubuntu-20.04, macos-latest, windows-latest]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}

.github/workflows/lint.yml

@@ -1,8 +1,9 @@
 name: Style Checks
 
 on:
-  - push
-  - pull_request
+  push:
+  pull_request:
+    types: [opened, reopened]
 
 jobs:
   lint:

.github/workflows/minimum.yml

@@ -1,16 +1,17 @@
 name: Unit Tests Minimum Versions
 
 on:
-  - push
-  - pull_request
+  push:
+  pull_request:
+    types: [opened, reopened]
 
 jobs:
   minimum:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         python-version: [3.6, 3.7, 3.8, 3.9]
-        os: [ubuntu-latest, macos-10.15, windows-latest]
+        os: [ubuntu-20.04, macos-latest, windows-latest]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}

.github/workflows/readme.yml

@@ -1,16 +1,17 @@
 name: Test README
 
 on:
-  - push
-  - pull_request
+  push:
+  pull_request:
+    types: [opened, reopened]
 
 jobs:
   readme:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         python-version: [3.6, 3.7, 3.8, 3.9]
-        os: [ubuntu-latest, macos-10.15]   # skip windows bc rundoc fails
+        os: [ubuntu-20.04, macos-latest]   # skip windows bc rundoc fails
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}

.github/workflows/unit.yml

@@ -1,16 +1,17 @@
 name: Unit Tests
 
 on:
-  - push
-  - pull_request
+  push:
+  pull_request:
+    types: [opened, reopened]
 
 jobs:
   unit:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         python-version: [3.6, 3.7, 3.8, 3.9]
-        os: [ubuntu-latest, macos-10.15, windows-latest]
+        os: [ubuntu-20.04, macos-latest, windows-latest]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python ${{ matrix.python-version }}