refactor: use nanocolors instead of chalk (#56)

Author: SukkaW

lib/log.js

@@ -1,7 +1,7 @@
 'use strict';
 
 const { Console } = require('console');
-const chalk = require('chalk');
+const nanocolors = require('nanocolors');
 
 const TRACE = 10;
 const DEBUG = 20;
@@ -55,14 +55,14 @@ class Logger {
       const str = new Date().toISOString().substring(11, 23) + ' ';
 
       if (level === TRACE || level >= WARN) {
-        process.stderr.write(chalk[LEVEL_COLORS[DEBUG]](str));
+        process.stderr.write(nanocolors[LEVEL_COLORS[DEBUG]](str));
       } else {
-        process.stdout.write(chalk[LEVEL_COLORS[DEBUG]](str));
+        process.stdout.write(nanocolors[LEVEL_COLORS[DEBUG]](str));
       }
     }
 
     if (level >= this.level) {
-      const str = chalk[LEVEL_COLORS[level]](LEVEL_NAMES[level]) + ' ';
+      const str = nanocolors[LEVEL_COLORS[level]](LEVEL_NAMES[level]) + ' ';
       if (level === TRACE || level >= WARN) {
         process.stderr.write(str);
       } else {