fix: Use addon's moduleName() if present.

Author: Tim Lindvall

ts/lib/commands/precompile.ts

@@ -53,8 +53,9 @@ export default command({
     // addon name from its package name, we use the addon name, since that is
     // how it will be written for imports.
     let addon = this.project.addons.find((addon) => addon.root === this.project.root);
-    if (addon && addon.name !== packageName) {
-      packageName = addon.name;
+    if (addon) {
+      let addonName = addon.moduleName ? addon.moduleName() : addon.name;
+      packageName = addonName;
     }
 
     let createdFiles = copyDeclarations(pathRoots, paths, packageName, this.project.root);

ts/types/ember-cli/index.d.ts

@@ -40,6 +40,7 @@ declare module 'ember-cli/lib/models/addon' {
     serverMiddleware(options: { app: Application; options?: TaskOptions }): void | Promise<void>;
     testemMiddleware(app: Application, options?: TaskOptions): void;
     setupPreprocessorRegistry(type: 'self' | 'parent', registry: PreprocessRegistry): void;
+    moduleName(): string;
   }
 }