add pointColor option

Author: fjc0k

README-zh.md

@@ -79,6 +79,7 @@ cn.destroy();
 ## 配置
 
  - **`color`**: 线条颜色, 默认: `'0,0,0'` ；三个数字分别为(R,G,B)，注意用,分割
+ - **`pointColor`**: 交点颜色, 默认: `'0,0,0'` ；三个数字分别为(R,G,B)，注意用,分割
  - **`opacity`**: 线条透明度（0~1）, 默认: `0.5`
  - **`count`**: 线条的总数量, 默认: `150`
  - **`zIndex`**: 背景的z-index属性，css属性用于控制所在层的位置, 默认: `-1`

README.md

@@ -81,6 +81,7 @@ cn.destroy();
 ## Configuration
 
  - **`color`**: color of lines, default: `'0,0,0'`; RGB values: (R,G,B).(note: use ',' to separate.)
+ - **`pointColor`**: color of points, default: `'0,0,0'`; RGB values: (R,G,B).(note: use ',' to separate.)
  - **`opacity`**: the opacity of line (0~1), default: `0.5`.
  - **`count`**: the number of lines, default: `99`.
  - **`zIndex`**: z-index property of the background, default: `-1`.