fix(build): remove ppx_bitstring version requirement

To compile with 5.4.0, this is necessary to use newest package.

Author: PerfectLaugh

bap-elf.opam

@@ -15,7 +15,7 @@ depends: [
   "core"
   "bap-common" {= version}
   "ppx_bap" {= version}
-  "ppx_bitstring" {>= "4.0.0" & < "5.0.0"}
+  "ppx_bitstring"
   "regular" {= version}
   "odoc" {with-doc}
 ]

dune-project

@@ -508,7 +508,7 @@ details of the program behavior.")
   core
   (bap-common (= :version))
   (ppx_bap (= :version))
-  (ppx_bitstring (and (>= 4.0.0) (< 5.0.0)))
+  ppx_bitstring
   (regular (= :version))))
 
 (package