opam syntax: update fields list

Author: rjbou

syntax/opam.vim

@@ -20,21 +20,27 @@ syn keyword opamKeyword1 depexts
 syn keyword opamKeyword1 depopts
 syn keyword opamKeyword1 description
 syn keyword opamKeyword1 doc
-syn keyword opamKeyword1 env
+syn keyword opamKeyword1 extra-files
+syn keyword opamKeyword1 features
+syn keyword opamKeyword1 flags
 syn keyword opamKeyword1 homepage
 syn keyword opamKeyword1 install
+syn keyword opamKeyword1 libraries
 syn keyword opamKeyword1 license
 syn keyword opamKeyword1 maintainer
+syn keyword opamKeyword1 messages
 syn keyword opamKeyword1 name
-syn keyword opamKeyword1 packages
 syn keyword opamKeyword1 patches
 syn keyword opamKeyword1 pin-depends
 syn keyword opamKeyword1 remove
+syn keyword opamKeyword1 run-test
+syn keyword opamKeyword1 setenv
 syn keyword opamKeyword1 substs
 syn keyword opamKeyword1 synopsis
+syn keyword opamKeyword1 syntax
 syn keyword opamKeyword1 tags
 syn keyword opamKeyword1 version
-syn match opamKeyword2 "\v(bug-reports|post-messages|opam-version|dev-repo|build-test|build-doc|build)"
+syn match opamKeyword2 "\v(bug-reports|post-messages|opam-version|dev-repo|build)"
 
 syn keyword opamTodo FIXME NOTE NOTES TODO XXX contained
 syn match opamComment "#.*$" contains=opamTodo,@Spell