Remove native and env as direct dependencies.
0.8.254
Remove circular dependency.
0.8.255
Remove fs dependency.
Remove cli-rc dependency.
0.8.256
Use merge with copy true.
0.8.257
Remove use property from middleware functions.
0.8.258
Use define() from cli-util.
0.8.259
Move cli-help to devDependencies.

Do not use request() declared on program, will be deprecated.
0.8.260
Support passing req to parse().
0.8.261
Do not expose cli-help module (doc).
0.8.262