Fix keys cache

[ertrzyiks]

The keys cache was store just by the key, which caused camelize option to be ignored if the value for the key was already in cache.

According to my tests, the performance drop is marginal.

Warming up --------------------------------------
            original   578.000  i/100ms
         fixed cache   589.000  i/100ms
Calculating -------------------------------------
            original      5.618k (± 9.8%) i/s -     28.322k in   5.098340s
         fixed cache      5.540k (±11.3%) i/s -     27.683k in   5.068007s

Comparison:
            original:     5617.6 i/s
         fixed cache:     5540.2 i/s - same-ish: difference falls within error

The code I used to run benchmark

require 'benchmark/ips'

it 'is still performant', do 
  
  Gon.int_cased = 1

 
 Benchmark.ips do |x| 
    
    x.config(:time => 5, :warmup => 2) 
 
     


     x.report('original') { @base.include_gon(camel_case: true) }

     x.report('fixed cache') { @base.include_gon(camel_case: true, fix_cache: true) }


     x.compare!
  end
end

...

js_key = convert_key(key, _o.cameled, _o.fix_cache)

....

def convert_key(key, camelize, fix_cache)
  cache = RequestStore.store[:gon_keys_cache] ||= {}
  if fix_cache then
    cache["#{key}_#{camelize}"] ||= camelize ? key.to_s.camelize(:lower) : key.to_s
  else
    cache[key] ||= camelize ? key.to_s.camelize(:lower) : key.to_s
  end
end

[ertrzyiks]

Looks like failed specs come from the master branch.