[Vuejs]-How to specific a output file when converting from version 1 to version 2

There are a few errors in your command (e.g. using -input instead of --input or keeping the <>), here’s an example from the official GitHub repository:

$ postman-collection-transformer convert \
--input ./v1-collection.json \
--input-version 2.0.0 \
--output ./v2-collection.json \
--output-version 1.0.0 \
--pretty \
--overwrite

I’d recommend using this one replacing the values you need.