depends: Bump MacOS minimum runtime requirement to 11.0

This is necessary as the new fixup_chains linker behavior is only valid
when the runtime target is >=11.0.

share/qt/Info.plist.in

@@ -3,7 +3,7 @@
 <plist version="0.9">
 <dict>
   <key>LSMinimumSystemVersion</key>
-  <string>10.15.0</string>
+  <string>11</string>
 
   <key>LSArchitecturePriority</key>
   <array>