chore: add keywords to pyproject.toml (#305)

Signed-off-by: Federico Bond <federicobond@gmail.com>

Author: federicobond

pyproject.toml

@@ -15,7 +15,12 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
 ]
-keywords = []
+keywords = [
+    "openfeature",
+    "feature",
+    "flags",
+    "toggles",
+]
 dependencies = []
 requires-python = ">=3.8"