Incorrect behaviour with numbers

[Ekhrapykin]

Hello
My code received object from API and do not know its format.
Even I got already camecased object, it capitalises "C", but should not.
camelcaseKeys({"i2cTapSensor": "value"});
{ i2CTapSensor: 'value' }

As a workaround, added the key to exclusion:
{exclude: ["i2cTapSensor"]}

[sindresorhus]

Duplicate of #77