release: bump version to 3.4.0

Signed-off-by: ljedrz <[email protected]>

Author: ljedrz

CHANGELOG.md

@@ -1,3 +1,15 @@
+Version 3.4.0
+=============
+
+Changes
+-------
+- the terms in the classic notation can now be parsed with a context of free variables
+- added `ParseError::UndefinedFreeVariable`, `parse_with_context`, `Context`, `Term::{max_free_index, with_context}`
+
+Thanks
+-------
+- @hiratara for all the changes in this release
+
 Version 3.3.0
 =============
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lambda_calculus"
-version = "3.3.0"
+version = "3.4.0"
 description = "A simple, zero-dependency implementation of pure lambda calculus in Safe Rust"
 repository = "https://github.com/ljedrz/lambda_calculus"
 documentation = "https://docs.rs/lambda_calculus"