TS compilation error

[saosebastiao]

Using ember new xxxx -b @glimmer/blueprint --web-component generates an index.ts that compiles with an error:

/src/index.ts(21,31): Argument of type 'string[]' is not assignable to parameter of type '{ [key: string]: string; }'.
  Index signature is missing in type 'string[]'.

#src/index.ts
21: initializeCustomElements(app, ['xxxx']);