Update pymilvus version (#18737)

Signed-off-by: NBinbin Lv <binbin.lv@zilliz.com>
Signed-off-by: NBinbin Lv <binbin.lv@zilliz.com>

tests/python_client/requirements.txt

@@ -9,7 +9,7 @@ allure-pytest==2.7.0
 pytest-print==0.2.1
 pytest-level==0.1.1
 pytest-xdist==2.5.0
-pymilvus==2.2.0.dev8
+pymilvus==2.2.0.dev19
 pytest-rerunfailures==9.1.1
 git+https://github.com/Projectplace/pytest-tags
 ndg-httpsclient