docs: update readme

Signed-off-by: Jack Cherng <jfcherng@gmail.com>

Author: jfcherng

README.md

@@ -58,12 +58,6 @@ composer require jfcherng/php-color-output
  * @return string the string without colors
  */
 \Jfcherng\Utility\CliColor::noColor(string $str): string
-
-// a global alias to \Jfcherng\Utility\CliColor::color()
-function str_cli_color(string $str, $colors = [], bool $reset = true): string
-
-// a global alias to \Jfcherng\Utility\CliColor::noColor()
-function str_cli_nocolor(string $str): string
 ```
 
 
@@ -74,26 +68,28 @@ function str_cli_nocolor(string $str): string
 
 include __DIR__ . '/vendor/autoload.php';
 
+use \Jfcherng\Utility\CliColor;
+
 // colors in a string using a comma as the delimiter
-echo str_cli_color('foo', 'f_light_cyan, b_yellow');  // "\033[1;36;43mfoo\033[0m"
+echo CliColor::color('foo', 'f_light_cyan, b_yellow');  // "\033[1;36;43mfoo\033[0m"
 
 echo PHP_EOL;
 
 // colors in an array
-echo str_cli_color('foo', ['f_white', 'b_magenta']); // "\033[1;37;45mfoo\033[0m"
+echo CliColor::color('foo', ['f_white', 'b_magenta']); // "\033[1;37;45mfoo\033[0m"
 
 echo PHP_EOL;
 
 // do not auto reset color at the end of string
-echo str_cli_color('foo', ['f_red', 'b_green', 'b', 'blk'], false); // "\033[31;42;1;5mfoo"
+echo CliColor::color('foo', ['f_red', 'b_green', 'b', 'blk'], false); // "\033[31;42;1;5mfoo"
 
 // manually add color reset
-echo str_cli_color('', 'reset'); // "\033[0m"
+echo CliColor::color('', 'reset'); // "\033[0m"
 
 echo PHP_EOL;
 
 // remove all color codes from a string
-echo str_cli_nocolor("\033[31;42;5mfoo\033[0mbar"); // "foobar"
+echo CliColor::noColor("\033[31;42;5mfoo\033[0mbar"); // "foobar"
 
 echo PHP_EOL;
 ```