Upgrade itsdangerous recipe to 2.2.0

itsdangerous version 2.2.0 eliminated their setup.py, so all
toolchain builds of itsdangerous fails due to missing setup.py.

This patch updates the recipe for itsdangerous to run pip to
install the 2.2.0 version.

kivy_ios/recipes/itsdangerous/__init__.py

@@ -6,19 +6,19 @@
 
 
 class ItsDangerousRecipe(PythonRecipe):
-    version = "1.1.0"
+    version = "2.2.0"
     url = "https://github.com/mitsuhiko/itsdangerous/archive/{version}.zip"
     depends = ["python"]
 
     def install(self):
         plat = list(self.platforms_to_build)[0]
         build_dir = self.get_build_dir(plat)
-        hostpython = sh.Command(self.ctx.hostpython)
+        hostpython_pip = sh.Command(join(self.ctx.dist_dir, "hostpython3", "bin", "pip3"))
         build_env = plat.get_env()
         dest_dir = join(self.ctx.dist_dir, "root", "python3")
         build_env['PYTHONPATH'] = self.ctx.site_packages_dir
         with cd(build_dir):
-            shprint(hostpython, "setup.py", "install", "--prefix", dest_dir, _env=build_env)
+            shprint(hostpython_pip, "install", build_dir, "--prefix", dest_dir, _env=build_env)
 
 
 recipe = ItsDangerousRecipe()