Suppress INFO statements during generation

**Describe the problem/challenge you have**
I use this library to generate a bunch of .yaml files from the templates. While generating, it usually puts a generic INFO: statements about generating the files.

**Describe the solution you'd like**
It is a lot of distraction when building a whole project. I want to be able to change it to output only if encounter an error. Can we modify the library to have a --logger-level or something similar command line option?

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