Wrong installer type in composer.json

First of all: thanks for this impressive idea and this great module. We are already quite eccentric about using the module in our projects. :)

Problem/Motivation

Composer Installers defines several installer types for Drupal. The composer.json shipped with Typed Entity uses "drupal-project" which is not defined.

This results in installing the module in vendor/drupal/typed_entity instead of modules/contrib (as defined by "installer-paths" in the projects composer.json.

Proposed resolution

Change the type from "drupal-project" to "drupal-module".