fix: TypeError when requiring discord.js

[favna]

fixes #547

Fix the TypeError when getting the output type of "require('discord.js')".

• Modify Type.resolve method in src/lib/index.ts to handle cases where the constructor is null.
  • Add a check to return 'Object' if the constructor is null.
• Add a test case in tests/objects.test.ts to verify the handling of modules with null constructors.
• Add a new test file tests/module.test.ts to test the Type class with the discord.js module.
• Update package.json to include discord.js as a dev dependency.
• Update vitest.config.ts to exclude the scripts/ directory from coverage.

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