Error while trying to macroexpand a `defn` form having its `attr-map?` set

[ikappaki]

Hi,

there appears to be an issue when trying to macroexpand a defn form with an attr-map? set:
error occurred during macroexpansion: Object of type <class 'basilisp.lang.list.PersistentList'> does not implement IAssociative interface

to reproduce

• Open up the REPL and try to macroexpand a defn form having attr-map? set, the above error is raised

> basilisp repl
basilisp.user=> (macroexpand '(defn xyz {:abc true} [] 5))

  exception: <class 'TypeError'> from <class 'basilisp.lang.compiler.exception.CompilerException'>
      phase: :macroexpansion
    message: error occurred during macroexpansion: Object of type <class 'basilisp.lang.list.PersistentList'> does not implement IAssociative interface
       form: (defn xyz {:abc true} [] 5)
   location: <Macroexpand>:NO_SOURCE_LINE

PR to follow.

[chrisrink10]

Fixed in #1187