Rename method and stop passing unused arguements.

[vipulnsward]

• Renamed increment_or_decrement to an apt set_cache_value since it actually doesn't increment/decrement in localstore.
• Stopped passing unused increment amount value to it.

[arthurnn]

I am sure people extend that class, wondering if they rely on the amount value for something.

[vipulnsward]

@arthurnn from the LocalStore class? They might but from the more generic Store class instead.

[rafaelfranca]

What are the benefits of this change? As the code were before I could include local storage and override my increment_or_decrement method to do what I want receiving a amount value. Now I'd have to override the increment method to change it to pass the amount value.

[vipulnsward]

@rafaelfranca that method is just an private internal helper method to re-use code.
To override behaviour for a store, user ideally would overwrite increment method, as done by all other cache store implementations. I have not changed the signature of increment method.

[rafaelfranca]

Even with this I prefer to keep passing amount. A class including this module can choose to override only the private method. I'd change that method to protected

[vipulnsward]

makes sense, will update.

[vipulnsward]

@rafaelfranca updated.