Fix formatting in REPL version display

Author: hemanta-gayen

README.md

@@ -579,7 +579,7 @@ exprify
 ```
 
 ```
-Exprify v1.0.5 — interactive REPL
+Exprify v1.0.5 - interactive REPL
 Type an expression or .help for commands
 
 » 2 + 2

bin/cli.mjs

@@ -132,7 +132,7 @@ for (const arg of args) {
 }
 
 function startREPL() {
-  console.log(`Exprify v${pkg.version} — interactive REPL`);
+  console.log(`Exprify v${pkg.version} - interactive REPL`);
   console.log('Type an expression or .help for commands\n');
 
   const rl = createInterface({