Removed oniguruma from dependencies.

Removed oniguruma from dependencies.
It had many compatibility issues that especially on Windows.
Possibly you can more easily to install Aigis on Windows.

FYI: This version include replace syntax-highlighter from highlights to prism which means
If you used version 1.0.x, you have to replace highlight theme. You can download highlight theme on prism/download. You can replace easily.
More information, see the following link docs/syntax highlight