replace string-length with string-width (#45)

this pr fix #43

Author: cncolder

package.json

@@ -42,6 +42,6 @@
   "dependencies": {
     "chalk": "^1.1.3",
     "error-stack-parser": "^2.0.0",
-    "string-length": "^1.0.1"
+    "string-width": "^2.0.0"
   }
 }

src/output.js

@@ -2,7 +2,7 @@
 
 const colors = require('./utils/colors');
 const chalk = require('chalk');
-const stringLength = require('string-length');
+const stringWidth = require('string-width');
 const readline = require('readline');
 
 class Debugger {
@@ -64,7 +64,7 @@ class Debugger {
       }
 
       // Make timestamp appear at the end of the line
-      let logSpace = process.stdout.columns - stringLength(message) - stringLength(dateString)
+      let logSpace = process.stdout.columns - stringWidth(message) - stringWidth(dateString)
       if (logSpace <= 0) {
         logSpace = 10
       }