Update opam files.

opam/why3-base/opam

@@ -21,7 +21,7 @@ tags: [
   "automated theorem prover"
   "interactive theorem prover"
 ]
-available: [ ocaml-version >= "4.01.0" ]
+available: [ ocaml-version >= "4.02.3" ]
 
 # Jessie3 (frama-c plugin) is *disabled* because it is not ready
 build: [

opam/why3-base/url

-archive: "https://gforge.inria.fr/frs/download.php/file/36398/why3-0.87.3.tar.gz"
-checksum: "ea24a4877ca09e2ec4fff19d5f4d35c6"
+archive: "https://gforge.inria.fr/frs/download.php/file/37147/why3-0.88.0.tar.gz"
+checksum: "1aef885ff8eee34107585e11db623a8d"

opam/why3/opam

@@ -19,15 +19,18 @@ tags: [
   "automated theorem prover"
   "interactive theorem prover"
 ]
-available: [ ocaml-version >= "4.01.0" ]
+available: [ ocaml-version >= "4.02.3" ]
 depends: [
-  "why3-base" { = "0.87.3" }
+  "why3-base" { = "0.88.0" }
   "lablgtk"
   "conf-gtksourceview"
   "zarith"
   "camlzip"
   "ocamlgraph"
 ]
+depopts: [
+  "coq"
+]
 messages:[
 "Coq realizations of Why3 theories are only available if Coq is installed" { !coq:installed }
 ]