Update to Dune 3.0

> Since Dune 2.8, it’s possible to deactivate the systematic
> prepending of flags coming from ocamlc -config to the C compiler
> command line.
> The value true is the default for Dune 3.0.

https://dune.readthedocs.io/en/stable/dune-files.html#use-standard-c-and-cxx-flags

bigstringaf.opam

@@ -7,12 +7,21 @@ bug-reports: "https://github.com/inhabitedtype/bigstringaf/issues"
 dev-repo: "git+https://github.com/inhabitedtype/bigstringaf.git"
 build: [
   ["dune" "subst"] {dev}
-  ["dune" "build" "-p" name "-j" jobs]
-  ["dune" "runtest" "-p" name] {with-test}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
 ]
 depends: [
-  "dune" {>= "2.6.0"}
-  "dune-configurator" {>= "2.0.0"}
+  "dune" {>= "3.0"}
+  "dune-configurator" {>= "3.0"}
   "alcotest" {with-test}
   "ocaml" {>= "4.08.0"}
   "conf-pkg-config" {build}

dune-project

@@ -1,3 +1,3 @@
-(lang dune 2.6)
+(lang dune 3.0)
 (name bigstringaf)
-(formatting disabled)
+(formatting (enabled_for dune))

lib/config/dune

@@ -1,3 +1,3 @@
 (executable
  (name discover)
- (libraries dune-configurator))
+ (libraries dune-configurator))

lib/dune

@@ -1,16 +1,16 @@
 (library
- (name        bigstringaf)
+ (name bigstringaf)
  (public_name bigstringaf)
-
  (foreign_stubs
   (language c)
-  (names     bigstringaf_stubs)
-  (flags     (:standard (:include cflags.sexp))))
-
- (js_of_ocaml (javascript_files runtime.js))
-)
+  (names bigstringaf_stubs)
+  (flags
+   (:standard
+    (:include cflags.sexp))))
+ (js_of_ocaml
+  (javascript_files runtime.js)))
 
 (rule
  (targets cflags.sexp)
- (action 
+ (action
   (run config/discover.exe)))

lib_test/dune

@@ -1,4 +1,4 @@
 (test
  (name test_bigstringaf)
  (libraries alcotest bigstringaf)
- (modules   test_bigstringaf s))
+ (modules test_bigstringaf s))