Replace PySide2-stubs with types-PySide2

Replace PySide2-stubs with types-PySide2, both of which are projects
that provide PySide2 typing hints, for the following reasons:

1. types-PySide2 is more complete and allows us to ditch some 'type:
   ignore' comments for Mypy.
2. PySide2-stubs also brings PySide2 as a dependency, which cannot be
   installed in MacOS M1 machines.

Refs #177

dangerzone/gui/logic.py

@@ -176,13 +176,13 @@ def __init__(
         self.setLayout(layout)
 
     def clicked_ok(self) -> None:
-        self.done(QtWidgets.QDialog.Accepted)
+        self.done(int(QtWidgets.QDialog.Accepted))
 
     def clicked_extra(self) -> None:
         self.done(2)
 
     def clicked_cancel(self) -> None:
-        self.done(QtWidgets.QDialog.Rejected)
+        self.done(int(QtWidgets.QDialog.Rejected))
 
     def launch(self) -> int:
         return self.exec_()

dangerzone/gui/main_window.py

@@ -46,7 +46,7 @@ def __init__(self, dangerzone: DangerzoneGui) -> None:
         header_label.setFont(self.dangerzone.fixed_font)
         header_label.setStyleSheet("QLabel { font-weight: bold; font-size: 50px; }")
         header_version_label = QtWidgets.QLabel(get_version())
-        header_version_label.setProperty("class", "version")  # type: ignore [arg-type]
+        header_version_label.setProperty("class", "version")
         header_version_label.setAlignment(QtCore.Qt.AlignBottom)
 
         header_layout = QtWidgets.QHBoxLayout()
@@ -363,7 +363,7 @@ def __init__(self, dangerzone: DangerzoneGui) -> None:
         self.docs_selected_label = QtWidgets.QLabel("No documents selected")
         self.docs_selected_label.setAlignment(QtCore.Qt.AlignCenter)
         self.docs_selected_label.setContentsMargins(0, 0, 0, 20)
-        self.docs_selected_label.setProperty("class", "docs-selection")  # type: ignore [arg-type]
+        self.docs_selected_label.setProperty("class", "docs-selection")
 
         # Save safe version
         self.save_checkbox = QtWidgets.QCheckBox()
@@ -373,9 +373,7 @@ def __init__(self, dangerzone: DangerzoneGui) -> None:
         self.safe_extension_label = QtWidgets.QLabel("Save as")
         self.safe_extension_filename = QtWidgets.QLabel("document")
         self.safe_extension_filename.setAlignment(QtCore.Qt.AlignRight)
-        self.safe_extension_filename.setProperty(
-            "style", "safe_extension_filename"  # type: ignore
-        )
+        self.safe_extension_filename.setProperty("style", "safe_extension_filename")
         self.safe_extension = QtWidgets.QLineEdit()
         self.safe_extension.setStyleSheet("margin-left: -6px;")  # no left margin
         self.safe_extension.textChanged.connect(self.update_ui)

pyproject.toml

@@ -30,7 +30,7 @@ pyinstaller = {version = "*", platform = "darwin"}
 black = "*"
 isort = "*"
 mypy = "*"
-PySide2-stubs = "*"
+types-PySide2 = "*"
 
 # Dependencies required for testing the code.
 [tool.poetry.group.test.dependencies]