Add fmt constraints on git due to #27596

Author: dbuenzli

packages/git/git.3.0.0/opam

@@ -34,7 +34,7 @@ depends: [
   "carton-lwt" {< "0.2.0"}
   "carton-git" {< "0.2.0"}
   "ke" {>= "0.4"}
-  "fmt" {>= "0.8.7"}
+  "fmt" {>= "0.8.7" & < "0.10.0"}
   "checkseum" {>= "0.2.1"}
   "ocamlgraph" {>= "1.8.8"}
   "astring"

packages/git/git.3.1.0/opam

@@ -34,7 +34,7 @@ depends: [
   "carton-lwt" {< "0.2.0"}
   "carton-git" {< "0.2.0"}
   "ke" {>= "0.4"}
-  "fmt" {>= "0.8.7"}
+  "fmt" {>= "0.8.7" & < "0.10.0"}
   "checkseum" {>= "0.2.1"}
   "ocamlgraph" {>= "1.8.8"}
   "astring"

packages/git/git.3.1.1/opam

@@ -34,7 +34,7 @@ depends: [
   "carton-lwt" {< "0.2.0"}
   "carton-git" {< "0.2.0"}
   "ke" {>= "0.4"}
-  "fmt" {>= "0.8.7"}
+  "fmt" {>= "0.8.7" & < "0.10.0"}
   "checkseum" {>= "0.2.1"}
   "ocamlgraph" {>= "1.8.8"}
   "astring"