wast2json errors for memory.grow and memory.size

[poemm]

wast2json returns errors on instructions memory.grow and memory.size. Errors look like the following when run on the official test suite file memory.wast.

$ wast2json memory.wast -o memory.json
memory.wast:11:64: error: unexpected token "memory.size", expected an instr.
(module (memory (data)) (func (export "memsize") (result i32) (memory.size)))
                                                               ^^^^^^^^^^^
memory.wast:13:67: error: unexpected token "memory.size", expected an instr.
(module (memory (data "")) (func (export "memsize") (result i32) (memory.size)))
                                                                  ^^^^^^^^^^^
memory.wast:15:68: error: unexpected token "memory.size", expected an instr.
...ule (memory (data "x")) (func (export "memsize") (result i32) (memory.size)))
                                                                  ^^^^^^^^^^^
memory.wast:39:24: error: unexpected token "memory.size", expected an expr.
  (module (func (drop (memory.size))))
                       ^^^^^^^^^^^
memory.wast:43:12: error: unexpected token "func", expected an instr.
  (module (func (drop (memory.grow (i32.const 0)))))
           ^^^^
memory.wast:43:24: error: unexpected token memory.grow.
  (module (func (drop (memory.grow (i32.const 0)))))

Similar errors for the following files from the official test suite.

br.wast
br_table.wast
imports.wast
linking.wast
memory_trap.wast
memory.wast
nop.wast
resizing.wast
return.wast
typecheck.wast
unreachable.wast

[binji]

I implemented that recently in #849, perhaps you need to update?

[poemm]

Yes! Great tool, works great! Thank you!