COMP: Install newer Python for cookiecutter testing

CI failing with:

Collecting cookiecutter
  Downloading https://files.pythonhosted.org/packages/95/83/83ebf950ec99b02c61719ccb116462844ba2e873df7c4d40afc962494312/cookiecutter-1.7.2-py2.py3-none-any.whl
Collecting click>=7.0 (from cookiecutter)
  Downloading https://files.pythonhosted.org/packages/d2/3d/fa76db83bf75c4f8d338c2fd15c8d33fdd7ad23a9b5e57eb6c5de26b430e/click-7.1.2-py2.py3-none-any.whl (82kB)
Collecting jinja2-time>=0.2.0 (from cookiecutter)
  Downloading https://files.pythonhosted.org/packages/6a/a1/d44fa38306ffa34a7e1af09632b158e13ec89670ce491f8a15af3ebcb4e4/jinja2_time-0.2.0-py2.py3-none-any.whl
Collecting python-slugify>=4.0.0 (from cookiecutter)
  Downloading https://files.pythonhosted.org/packages/9f/42/e336f96a8b6007428df772d0d159b8eee9b2f1811593a4931150660402c0/python-slugify-4.0.1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
    ImportError: No module named setuptools

Author: thewtex

.github/workflows/build-test-package.yml

@@ -29,10 +29,10 @@ jobs:
     steps:
     - uses: actions/checkout@v1
 
-    - name: Set up Python 3.7
-      uses: actions/setup-python@v1
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v2
       with:
-        python-version: 3.7
+        python-version: 3.8
 
     - name: Install build dependencies
       run: |
@@ -137,7 +137,7 @@ jobs:
       shell: cmd
 
   build-linux-python-packages:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       max-parallel: 2
       matrix:
@@ -157,6 +157,11 @@ jobs:
         sudo rm -rf "$AGENT_TOOLSDIRECTORY"
         df -h
 
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.8
+
     - name: Evaluate template
       shell: bash
       run: |
@@ -204,6 +209,11 @@ jobs:
         curl -L https://raw.githubusercontent.com/InsightSoftwareConsortium/ITKPythonPackage/master/scripts/macpython-download-cache-and-build-module-wheels.sh -O
         chmod u+x macpython-download-cache-and-build-module-wheels.sh
 
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.8
+
     - name: Evaluate template
       shell: bash
       run: |
@@ -249,6 +259,11 @@ jobs:
     - name: Get specific version of CMake, Ninja
       uses: lukka/[email protected]
 
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.8
+
     - name: Evaluate template
       shell: bash
       run: |

{{cookiecutter.project_name}}/.github/workflows/build-test-package.yml

@@ -29,10 +29,10 @@ jobs:
     steps:
     - uses: actions/checkout@v1
 
-    - name: Set up Python 3.7
-      uses: actions/setup-python@v1
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v2
       with:
-        python-version: 3.7
+        python-version: 3.8
 
     - name: Install build dependencies
       run: |
@@ -130,7 +130,7 @@ jobs:
       shell: cmd
 
   build-linux-python-packages:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       max-parallel: 2
       matrix: