chore(.travis.yml): updates to build with stable and nightly
chore(.travis.yml): updates to build with stable and nightly

clog-tool/clog-lib,Vinatorul/clog-cli,semantic-rs/clog-lib,badboy/clog-lib,kentcdodds/clog,clog-tool/clog-cli,semantic-rs/clog-lib,kentcdodds/clog,badboy/clog-lib,Vinatorul/clog-lib,clog-tool/clog-cli,Vinatorul/clog-lib,thoughtram/clog