CI: switch to Node.js 16/npm >= 7 and move to native pip caching

Signed-off-by: XhmikosR <xhmikosr@gmail.com>

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ on:
 
 env:
   FORCE_COLOR: 2
-  NODE: 14.x
+  NODE: 16
   PYTHON_VERSION: "3.7"
 
 jobs:
@@ -26,6 +26,7 @@ jobs:
         with:
           python-version: "${{ env.PYTHON_VERSION }}"
           architecture: "x64"
+          cache: pip
 
       - name: Set up Node.js
         uses: actions/setup-node@v2
@@ -33,13 +34,6 @@ jobs:
           node-version: "${{ env.NODE }}"
           cache: npm
 
-      - name: Cache Python dependencies
-        uses: actions/cache@v2
-        with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/requirements.txt') }}
-          restore-keys: ${{ runner.os }}-pip-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/requirements.txt') }}
-
       - name: Install Python dependencies
         run: pip install -r requirements.txt