0.33.0

CHANGES:

• Fix a bug where Code_path.main_module_name would not properly remove
  extensions from the filename and therefore return an invalid module name.
  (#512, @NathanReb)

• Add -unused-type-warnings flag to the driver to allow users to disable
  only the generation of warning 34 silencing structure items when using
  [@@deriving ...] on type declarations. (#511, @mbarbin, @NathanReb)

• Make -unused-code-warnings flag to the driver also controls the generation
  of warning 34 silencing structure items when using [@@deriving ...] on type
  declarations. (#510, @mbarbin, @NathanReb)

• Driver: Add -unused-code-warnings=force command-line flag argument. (#490, @mbarbin)

• new functions Ast_builder.{e,p}list_tail that take an extra tail
  expression/pattern argument parameter compared to Ast_builder.{e,p}list, so
  they can build ASTs like a :: b :: c instead of only [ a; b ].
  (#498, #502, @v-gb, @NathanReb)

• Fix Longident.parse so it also handles indexing operators such as
  .!(), .%(;..)<-, or Vec.(.%()) (#494, @Octachron)

• Add a special_function' variant which directly takes a Longident.t
  argument to avoid the issue that Longident.t cover distinct syntaxic classes
  which cannot be easily parsed by a common parser (#496, @Octachron).

• Keep location ranges consistent when migrating Pexp_function nodes from 5.2+
  to older versions (#504, @jchavarri)

• Fix -locations-check behaviour so it is no longer required to pass -check
  as well to enable location checks. (#506, @NathanReb)