This release updates the alias to be cspush for cf7. This is because csp has been taken by cf7's create-space command.
Should one still want to use cf6 and the old csp alias, they can simply include the CF_CLI_CSP=1 environment variable when installing the plugin. For example, CF_CLI_CSP=1 cf install-plugin CreateServicePushPlugin.osx
Thanks to @FWinkler79 for his PR.