fix(deps): relax httpx version pin to >=0.27.2,<1.0.0 (#112)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: nicklasl

pyproject.toml

@@ -29,7 +29,7 @@ dependencies = [
     "requests>=2.33.1,<3.0.0",
     "openfeature-sdk==0.4.2", 
     "typing_extensions>=4.9.0,<5.0.0",
-    "httpx==0.27.2",
+    "httpx>=0.27.2,<1.0.0",
     "protobuf>=5.29.5,<7.0.0"
 ]
 requires-python = ">=3.10"