QCA package: add version 2.2.1 and update CMake args (#12576)

* Version 2.1.3 requires QT version 5.10.0 or earlier
* Add CMAKE_CXX_STANDARD=11 argument
* Add CMake argument when building against qt@4

var/spack/repos/builtin/packages/qca/package.py

@@ -20,6 +20,16 @@ class Qca(CMakePackage):
     homepage = "https://userbase.kde.org/QCA"
     url      = "https://github.com/KDE/qca/archive/v2.1.3.tar.gz"
 
+    version('2.2.1', sha256='c67fc0fa8ae6cb3d0ba0fbd8fca8ee8e4c5061b99f1fd685fd7d9800cef17f6b')
     version('2.1.3', 'bd646d08fdc1d9be63331a836ecd528f')
 
     depends_on('qt@4.2:')
+
+    depends_on('qt@:5.10.0', when='@2.1.3')
+
+    def cmake_args(self):
+        args = []
+        args.append('-DCMAKE_CXX_STANDARD=11')
+        if self.spec['qt'].version.up_to(1) == Version(4):
+            args.append('-DQT4_BUILD=ON')
+        return args