Bump version to 0.1.5

Author: actions-user

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 description = "High-performance modern Wilkinson's formula parsing for statistical models. Parses R-style formulas into structured JSON metadata supporting linear models, mixed effects, and complex statistical specifications."
 name = "fiasto"
-version = "0.1.4"
+version = "0.1.5"
 edition = "2021"
 authors = ["Alex Hallam <alexhallam6.28@gmail.com>"]
 license = "MIT"