Fix missing yarl requirement (#91)

Author: bdraco

requirements.txt

@@ -2,4 +2,4 @@
 ciso8601==2.3.2
 httpx==0.28.1
 zeep[async]==4.3.1
-yarl>=1.10.0
+yarl==1.18.3

setup.py

@@ -8,7 +8,12 @@
 version_path = os.path.join(here, "onvif/version.txt")
 version = open(version_path).read().strip()
 
-requires = ["httpx>=0.19.0,<1.0.0", "zeep[async]>=4.2.1,<5.0.0", "ciso8601>=2.1.3"]
+requires = [
+    "httpx>=0.19.0,<1.0.0",
+    "zeep[async]>=4.2.1,<5.0.0",
+    "ciso8601>=2.1.3",
+    "yarl>=1.10.0",
+]
 
 CLASSIFIERS = [
     "Development Status :: 3 - Alpha",