feat: add blue color support to printer and update tests

Author: AxiosLeo

index.d.ts

@@ -457,6 +457,7 @@ interface Printer {
   yellow(str: string): this;
   green(str: string): this;
   red(str: string): this;
+  blue(str: string): this;
 
   warning(...str: string[]): this;
   success(...str: string[]): this;
@@ -466,7 +467,7 @@ interface Printer {
 export const printer: Printer
 
 export namespace helper {
-  module fs {
+  namespace fs {
     /**
      * get extension of file without dot
      * @param filename 
@@ -585,7 +586,7 @@ export namespace helper {
     function _read_json(filepath: string): Promise<string>;
   }
 
-  module cmd {
+  namespace cmd {
     /**
      * sleep by milliseconds
      * @param ms 
@@ -694,7 +695,7 @@ export namespace helper {
     function _parallel(functions: Function[], options?: { parallelCount?: number, waitAll?: boolean }): Promise<void>
   }
 
-  module is {
+  namespace is {
     function undefined(a: any): boolean
     function array(a: any): boolean
     function string(a: any): boolean

src/printer.js

@@ -137,8 +137,14 @@ function red(str) {
   return this;
 }
 
+function blue(str) {
+  print(str.blue);
+  return this;
+}
+
 module.exports = {
   colors,
+
   fixed,
   print,
   themes,
@@ -153,7 +159,9 @@ module.exports = {
   warning,
   success,
   error,
+
   yellow,
   green,
+  blue,
   red
 };

tests/printer.tests.js

@@ -17,6 +17,7 @@ describe('print test case', function () {
     printer.yellow('yellow').green('yellow');
     printer.green('green').red('red');
     printer.red('red').yellow('yellow');
+    printer.blue('blue').green('green');
     printer.fixed('fixed str', 20, 'center').println('eol');
     printer.fixed('fixed').println('eol');
     // exec here is ok