CI: install pyinstaller

Author: malloch

.github/workflows/ci.yml

@@ -17,6 +17,7 @@ jobs:
       run: |
         python3 -m pip install --upgrade pip
         pip3 install -r requirements.txt
+        pip3 install pyinstaller
     - name: build standalone
       run:
         pyinstaller webmapper.spec
@@ -42,6 +43,7 @@ jobs:
       run: |
         python3 -m pip install --upgrade pip
         pip3 install -r requirements.txt
+        pip3 install pyinstaller
     - name: build standalone
       run:
         pyinstaller webmapper.spec
@@ -64,6 +66,7 @@ jobs:
       run: |
         python3 -m pip install --upgrade pip
         pip3 install -r requirements.txt
+        pip3 install pyinstaller
     - name: build standalone
       run:
         pyinstaller webmapper.spec