feat: is-not helpers, deps

[jfrazx]

No description provided.

[Copilot]

Pull Request Overview

This PR adds new "is-not" helper methods to the Envirator class, updates dependencies to newer versions, and migrates CI/CD from Travis CI to GitHub Actions. The changes enhance the API by providing negated environment check helpers and modernize the project's infrastructure.

Key changes:

• Added isNotProduction, isNotDevelopment, isNotTest, and isNotStaging getter methods
• Updated major dependencies including dotenv, TypeScript, and various dev dependencies
• Migrated from Travis CI to GitHub Actions workflows

Reviewed Changes

Copilot reviewed 9 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/env/index.ts	Added four new "is-not" environment check methods and improved JSDoc comment
test/load.spec.ts	Replaced winston logger references with console in tests
test/envirator.spec.ts	Replaced winston logger references with console in tests
package.json	Updated dependencies to newer versions and added npm-check script
cspell.json	Added new words to dictionary and updated version
LICENSE	Updated copyright year from 2021 to 2025
.travis.yml	Removed Travis CI configuration file
.github/workflows/tests.yml	Added GitHub Actions workflow for running tests
.github/workflows/release.yml	Added GitHub Actions workflow for releases

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