Chore/bump client spec (#339)

* chore: bump client spec to 5.1.9

Author: sighphyre

UnleashClient/constants.py

@@ -6,7 +6,7 @@
 REQUEST_TIMEOUT = 30
 REQUEST_RETRIES = 3
 METRIC_LAST_SENT_TIME = "mlst"
-CLIENT_SPEC_VERSION = "5.1.0"
+CLIENT_SPEC_VERSION = "5.1.9"
 
 # =Unleash=
 APPLICATION_HEADERS = {

tests/specification_tests/test_client_specs.py

@@ -12,7 +12,7 @@
 
 
 def load_spec(spec):
-    with open(path.join(CLIENT_SPEC_PATH, spec)) as _f:
+    with open(path.join(CLIENT_SPEC_PATH, spec), encoding="utf-8") as _f:
         data = json.load(_f)
         return (
             data["name"],