Add env option for environment variables to rules

[elado]

🚀 feature request - Add env for environment variables setting per rule

Relevant Rules

• nodejs_binary
• nodejs_test
• npm_package_bin

Description

Add env array to the rules so it's possible to set env vars.

Describe the solution you'd like

Example

load("@npm//jest:index.bzl", "jest_test")

jest_test(
  name = "jest",
  env = ["TZ=UTC"],
  ...
)

or

load("@npm//webpack:index.bzl", "webpack")

webpack(
  name = "jest",
  env = ["ENABLE_SOURCEMAPS=true", "ANOTHER_KEY=value"],
  ...
)

Describe alternatives you've considered

It's possible to add configuration_env_vars and --define in .bazelrc, however .bazelrc affects the entire repo, and it's not possible to use different env vars per rule.