add fill to the entry points

Author: gurukamath

setup.cfg

@@ -160,6 +160,7 @@ console_scripts =
     ethereum-spec-new-fork = ethereum_spec_tools.new_fork:main
     ethereum-spec-patch = ethereum_spec_tools.patch_tool:main
     ethereum-spec-evm = ethereum_spec_tools.evm_tools:main
+    ethereum-spec-fill = cli.pytest_commands.fill:fill
 
 docc.plugins =
     ethereum_spec_tools.docc.discover = ethereum_spec_tools.docc:EthereumDiscover