Bump version

Author: dsp-ant

Diff for: pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "mcp"
-version = "1.2.0.dev0"
+version = "1.3.0.dev0"
 description = "Model Context Protocol SDK"
 readme = "README.md"
 requires-python = ">=3.10"
@@ -83,4 +83,4 @@ target-version = "py310"
 members = ["examples/servers/*"]
 
 [tool.uv.sources]
-mcp = { workspace = true }
+mcp = { workspace = true }