Add pushtoarray insn to fix segfault with forwarding + splat

Example insns diff for `def x = [3]; def a(...) = b(*x, 2, 3, ...)`

     == disasm: #<ISeq:a@-e:1 (1,13)-(1,42)>
     local table (size: 1, argc: 0 [opts: 0, rest: -1, post: 0, block: -1, kw: -1@-1, kwrest: -1])
     [ 1] "..."@0
     0000 putself                                                          (   1)[Ca]
     0000 putself
     0000 opt_send_without_block                 <calldata!mid:x, argc:0, FCALL|VCALL|ARGS_SIMPLE>
     0000 splatarray                             true
     0000 putobject                              2
     0000 putobject                              3
    +0000 pushtoarray                            2
     0000 getlocal_WC_0                          "..."@0
     0000 sendforward                            <calldata!mid:b, argc:1, ARGS_SPLAT|ARGS_SPLAT_MUT|FCALL|FORWARDING>, nil
     0000 leave                                  [Re]

This matches the insns produced by parse.y

0 files changed, 0 insertions, 0 deletions