test(mypy): fix mypy tox gate

Author: CaselIT

tox.ini

@@ -152,13 +152,15 @@ deps = {[with-debug-tools]deps}
 skipsdist = True
 skip_install = True
 deps = mypy
+       jsonschema_rs
        types-jsonschema
 commands = python {toxinidir}/tools/clean.py "{toxinidir}/falcon"
            mypy falcon
 
 [testenv:mypy_tests]
 deps = {[testenv]deps}
        mypy
+       jsonschema_rs
        types-requests
        types-PyYAML
        types-ujson