convenience method for lossy conversion of lists to vectors

[trevor]

It would be handy to have a settable flag to convert lists to vectors if that level of detail isn't needed. For example:

puts YAML.dump EDN.read('[1 (2 [3 4] #{5 6} {:a 7 :b 8})]')
puts
puts
puts YAML.dump EDN.read('[1 [2 [3 4] #{5 6} {:a 7 :b 8}]]')

---
- 1
- !ruby/array:EDN::Type::List
  - 2
  - - 3
    - 4
  - !ruby/object:Set
    hash:
      5: true
      6: true
  - :a: 7
    :b: 8


---
- 1
- - 2
  - - 3
    - 4
  - !ruby/object:Set
    hash:
      5: true
      6: true
  - :a: 7
    :b: 8

Currently this behavior can be invoked with a one-line change of line 37 in lib/edn/transform.erb:

rule(:list => subtree(:array)) { EDN::Type::List.new(*array) }

to:

rule(:list => subtree(:array)) { array }