stramel
commented
6 years ago @malikfaizanhaider If you are running a hybrid setup and specifically want to resolve to 1 - 2 then you will need to escape the spaces. bower install --save PolymerLabs/promise-polyfill#1\ -\ 2.
If you don't need a hybrid setup, I would suggest just using the latest by using bower install --save PolymerLabs/promise-polyfill
I:\polymer>bower install --save PolymerLabs/promise-polyfill#1 - 2 bower promise-polyfill#1 cached https://github.com/PolymerLabs/promise-polyfill.git#1.0.1 bower promise-polyfill#1 validate 1.0.1 against https://github.com/PolymerLabs/promise-polyfill.git#1 bower ENOTFOUND Package - not found