v0.45.0

• BREAKING CHANGE: Custom templates using some obscure
  getters of modelType may no longer function (returnElement
  and others not used in standard templates). (#2665)
• BREAKING CHANGE: Implicit Future detection, where an
  asynchronous function without a declared return type had
  its return type listed as Future, is no more. Those
  functions now show a dynamic return type. (#2665)
• Fix a problem with enum field location calculations.
  (#2660, #2659)
• Support for AOT compilation of templates added to Mustachio,
  but not yet enabled. (#2664, #2651)
• Some additional new lookup code implementation and testing.