Remove PyQt5 pinning. Fixes #1011 (#1022)

* Remove PyQt5 pinning. Fixes #1011
* Bump Borg version in GH workflow.

.github/workflows/build-macos.yml

@@ -9,7 +9,7 @@ on:
       borg_version:
         description: 'Borg version to package'
         required: true
-        default: '1.1.15'
+        default: '1.1.16'
 
 jobs:
   build:
@@ -36,6 +36,9 @@ jobs:
       working-directory: requirements.d
     - name: Install Vorta
       run: |
+        # Use PyQt5 version supported by PyInstaller.
+        # See https://github.com/pyinstaller/pyinstaller/issues/5701
+        pip3 install 'pyqt5<=5.15.3'
         pip3 install .
     - name: Package with PyInstaller
       run: |

setup.cfg

@@ -39,7 +39,7 @@ setup_requires =
 install_requires =
   appdirs
   paramiko
-  pyqt5 <= 5.15.3
+  pyqt5
   peewee
   python-dateutil
   apscheduler < 4.0