Defensively fix the patdiff dependency

Author: lukstafi

dune-project

@@ -107,7 +107,9 @@
   ppx_expect
   (ppx_minidebug
    (>= 2.0.0))
-  (patdiff :with-test)
+  ; Cannot make it (patdiff :with-test), because `dune build -p neural_nets_lib @install`
+  ; builds the tutorials target from dune/test, despite it being inline_tests!
+  (patdiff (>= v0.15.0))
   (odoc :with-doc)
   (md2mld :with-doc))
  (tags

neural_nets_lib.opam

@@ -28,7 +28,7 @@ depends: [
   "ppx_jane"
   "ppx_expect"
   "ppx_minidebug" {>= "2.0.0"}
-  "patdiff" {with-test}
+  "patdiff" {>= "v0.15.0"}
   "odoc" {with-doc}
   "md2mld" {with-doc}
 ]