Added a way to set speaking rate in speech method

[kethomassen]

Overview

Adds a way to set the speaking rate (wpm) in the speech method without having to manually use the applescript method

Examples

speak "HELLO!", "Alex", 250 # Says "HELLO!" with voice "Alex" at a speaking rate of 250 wpm

speak "HELLO!" # Says "HELLO!" with voice "Alex" at a default speaking rate of 175 wpm

Changes

• [x] Added speech rate parameter to method speech
• [x] Updated documentation to reflect changes
• [x] Bumped version to 4.1.4 (from 4.1.3)

[ggilder]

Left a couple of comments, looks good to me otherwise. If you fix those I will merge and release.

[kethomassen]

Fixed :+1:

[ggilder]

Just released v4.1.4 with your addition. Thanks!