v0.1.2

Publish Rufl library, an efficient, reusable util function library of rust:

Feature:

• collection: utility functions to manipulate collection data type.(array, vector)
• eventbus: implements a simple event bus lib.
• file: utility functions for handling file operation.
• math: utility functions for handling mathematical calculations.
• random: utility functions for generating random number or string.
• string: utility functions for handling string.