ppx_js: behave better with merlin

[trefis]

No description provided.

[TyOverby]

@trefis please run make fmt

The failure in CI is due to ocamlformat

[hhugo]

I'll try to run some tests later this weekend.

[hhugo]

merlin.hide seems to be hiding/ignoring too much information.
In particular, asking the type of the right hand side of ##. or ## doesn't seems to work.
By rhs, I mean xxx in expressions bellow
o##xxx
o##xxx a b c
o##.xxx
o##.xxx := e

[trefis]

I have just pushed a new version which should behave as well as the current ppx (I have even noticed some improved answers).

[trefis]

@hhugo: CI is green.

[hhugo]

Thanks