Update Cargo.toml

Author: jackyarndley

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rust_fractal"
-version = "0.7.0"
+version = "0.7.1"
 authors = ["jackyarndley <34801340+jackyarndley@users.noreply.github.com>"]
 description = "Fast, efficient mandelbrot set renderer."
 edition = "2018"
@@ -26,4 +26,4 @@ features = ["float", "complex"]
 lto = "fat"
 codegen-units = 1
 #debug = true
-opt-level=3
+opt-level=3