Feature/enum support

[yasserfedsi]

Pull request overview

Adds enum validation support to validateEnv, allowing schema entries to specify a set of allowed string values (e.g., NODE_ENV: ["development", "production", "test"]) and validating process.env against that set.

Changes:

• Extend the Schema type to support enum rules (readonly string[]) and route those rules through a new parseEnum validator.
• Add Vitest coverage for valid/invalid enum values and ensure NODE_ENV is cleaned up between tests.
• Export EnumType and bump package version to 0.2.0.

[Copilot]

Pull request overview

Adds enum validation support to validateEnv, allowing schema entries to specify a set of allowed string values (e.g., NODE_ENV: ["development", "production", "test"]) and validating process.env against that set.

Changes:

• Extend the Schema type to support enum rules (readonly string[]) and route those rules through a new parseEnum validator.
• Add Vitest coverage for valid/invalid enum values and ensure NODE_ENV is cleaned up between tests.
• Export EnumType and bump package version to 0.2.0.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/validate.test.ts	Adds tests for enum validation and invalid enum error behavior; cleans up NODE_ENV in beforeEach.
src/validators.ts	Introduces parseEnum to validate env var values against an allowed set.
src/validateEnv.ts	Extends schema handling to support enum rules via Array.isArray(rule) and parseEnum.
src/index.ts	Re-exports EnumType from the public API.
package.json	Bumps package version to 0.2.0.
package-lock.json	Updates lockfile version metadata to 0.2.0.

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[yasserfedsi]

good