$VARNAME is what we use for environment variables, it's good to
separate.
Some people use envsubst for homemade variable interpolation, it's also
good to have separation there.
## Changes
- Replace development version with $DEV_VERSION
- Update experimental-jobs-as-code to make use of it.
## Tests
- Existing tests.
- Using this in https://github.com/databricks/cli/pull/2213
## Changes
- Ability to extend a list of replacements via test.toml
- Modify selftest to both demo this feature and to get rid of sed on
Windows.
## Tests
Acceptance tests. I'm also using it
https://github.com/databricks/cli/pull/2213 for things like pid.
Denis Bilenko