Fix dune 2.5 warning relative to menhir 2.1 (#1353)

`(using menhir 2.1)` implies `dune >= 2.2.0` (see #1330). Starting with dune 2.5.0, this triggers a warning. Using `(lang dune 2.2)` in the main project ensures consistent metadata.
ocaml-ppx · Apr 24, 2020 · 0e46fb2 · 0e46fb2
1 parent 42ac795
commit 0e46fb2
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diff --git a/dune b/dune
@@ -21,8 +21,8 @@
    %{targets}
    (run ocamlformat --help=plain))))
 
-(alias
- (name runtest)
+(rule
+ (alias runtest)
  (action
   (diff ocamlformat-help.txt ocamlformat-help.actual)))
 

diff --git a/dune-project b/dune-project
@@ -1,4 +1,4 @@
-(lang dune 1.11)
+(lang dune 2.2)
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;                                                                    ;
@@ -12,5 +12,4 @@
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
 (name ocamlformat)
-(using fmt 1.2)
 (using menhir 2.1)