Change the settings in the `engines` field of `package.json`

[odanado]

The engines field in package.json specifies fixed versions of Node.js and npm.
ref:

liff-cli/package.json

Lines 26 to 29 in 6493f64

	"engines": {
	"node": "22.2.0",
	"npm": "10.7.0"
	},

Fixing these versions is inconvenient for users of LIFF CLI.

npm warn EBADENGINE Unsupported engine {
npm warn EBADENGINE   package: '@line/liff-cli@0.2.0',
npm warn EBADENGINE   required: { node: '22.2.0', npm: '10.7.0' },
npm warn EBADENGINE   current: { node: 'v20.18.0', npm: '10.8.2' }
npm warn EBADENGINE }

By allowing broader versions, users can use LIFF CLI without warnings or errors.