lock sanic version

Pipfile

@@ -32,7 +32,7 @@ pytest-docker = "==0.6.1"
 pytest-mock = "==1.10.0"
 pytest-profiling = "*"
 pytest-pylint = "*"
-pytest-sanic = "*"
+pytest-sanic = "==0.1.13"
 pytest-timeout = "*"
 python-rapidjson = "*"
 requests = "*"
@@ -52,7 +52,7 @@ pipenv = "*"
 pygtrie = "*"
 python-json-logger = "*"
 python-rapidjson = "*"
-sanic = "*"
+sanic = "==0.8.3"
 structlog = "*"
 ujson = "*"
 uvloop = "*"