Add preserveConsecutiveUppercase option

[rocktimsaikia]

fixes #76
Builds on the reviews left on the previous attempt #64

• Added test cases
• Updated README
• Synced the updated examples of readme with declaration file
• Made some additional irrelevant to the issue tweaks [like removing spread operators from a single property ]

This to

options = {
       ...{pascalCase: false},
       ...options
};

to

options = {
       pascalCase: false,
       ...options
};

// @sindresorhus

[sindresorhus]

Can you fix the merge conflict?

[rocktimsaikia]

@sindresorhus Sure. I just resolved the merge conflicts. This pr can be merged now .

[sindresorhus]

Thanks :)

[rocktimsaikia]

Thanks to you. I am new to open source and started contributing to open source just a few months ago only through your projects :)
// @sindresorhus