message: fix(compiler): handle undefined annotation metadata
  In certain cases seen in production, simplify() can returned
  undefined when simplifying decorator metadata. This has proven tricky
  to reproduce in an isolated test, but the fix is simple and low-risk:
  don't attempt to spread an undefined set of annotations in the first
  place.
  PR Close
diff: @@ -163,8 +163,10 @@ export class StaticReflector implements CompileReflector {
  let ownAnnotations: any[] = [];
  if (classMetadata['decorators']) {
  ownAnnotations = simplify(type, classMetadata['decorators']);
  + if (ownAnnotations) {
  annotations.push(...ownAnnotations);
  }
  + }
  if (parentType && !this.summaryResolver.isLibraryFile(type.filePath) &&
  this.summaryResolver.isLibraryFile(parentType.filePath)) {
  const summary = this.summaryResolver.resolveSummary(parentType);
  