CI: update stuff (#1534)

* CI: skip SNI, skip unittests if not needed, run build for setup.py

* CI: update actions

* CI: update upload-artifact

Fixes more warnings

.github/workflows/unittests.yml

@@ -3,7 +3,19 @@
 
 name: unittests
 
-on: [push, pull_request]
+on:
+  push:
+    paths-ignore:
+      - 'docs/**'
+      - 'setup.py'
+      - '*.iss'
+      - '.gitignore'
+  pull_request:
+    paths-ignore:
+      - 'docs/**'
+      - 'setup.py'
+      - '*.iss'
+      - '.gitignore'
 
 jobs:
   build:
@@ -27,9 +39,9 @@ jobs:
             os: macos-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python.version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python.version }}
     - name: Install dependencies