Move the trait `Forest` to the crate "forest".

The purpose of this change is to share this trait with other crates,
such as the forth-coming "semiring" crate that will be responsible for
handling some simple semiring operations as well as the querying, in
my plans.

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 399eafb..ef6f2da 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,6 +27,7 @@ crate-type = ["cdylib"]
 chain = { path = "./chain" }
 grammar = { path = "./grammar" }
 graph = { path = "./graph" }
+forest = { path = "./forest" }
 
 [features]
 default = []