Add getter for CharStateMachine index

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "charred"
-version = "0.1.4"
+version = "0.1.5"
 authors = ["trivernis <trivernis@protonmail.com>"]
 edition = "2018"
 license-file = "LICENSE"

src/tapemachine.rs

@@ -52,6 +52,10 @@ impl CharTapeMachine {
         self.text.clone()
     }
 
+    pub fn get_index(&self) -> usize {
+        self.index
+    }
+
     /// Returns the next char
     /// if there is any
     pub fn next_char(&mut self) -> Option<char> {