fix: psycopg2 dependency causes building from source (#30)

Author: khvn26

poetry.lock

@@ -1,6 +1,6 @@
 [project]
 name = "flagsmith-common"
-version = "1.5.2"
+version = "1.6.0a1"
 description = "Flagsmith's common library"
 requires-python = ">=3.11,<4.0"
 dependencies = [
@@ -15,8 +15,8 @@ dependencies = [
     "flagsmith-flag-engine",
     "gunicorn (>=19.1)",
     "prometheus-client (>=0.0.16)",
-    "psycopg2 (>=2,<3)",
     "simplejson (>=3,<4)",
+    "psycopg2-binary (>=2.9,<3)",
 ]
 authors = [
     { name = "Matthew Elwell" },