CJS import broken due to type field in package.json

Dear Ionic Team,

Currently, it's not possible to import the project via CommonJS in a Typescript environment, as the `type: "module"` declaration in the `package.json` breaks the dual environments export. When `type: "module"` is set all import statements of .js files are treated as ES modules. 

To fix this bug, the `type: "module"` declaration needs to be removed.