Yodeling Yak

• Added support for the Google geocoder service (#34) (thanks @chris31415926535).
• An error is now thrown if invalid parameters are passed to geocoder services (the parameters checked are limit, address, street, city, county, state, postalcode, and country) (#53). This behavior can be toggled with the new param_error parameter in geo() (or geocode()).
• Leading zeros on Census FIPs geography columns are now preserved (#47).
• Bug fix for custom_query argument with Geocodio batch geocoding (#48).
• Bug fix for vctrs datatype error with cascade method (#49).
• Added more comprehensive testing for internal package functions such as package_addresses, unpackage_addresses, and get_api_query (#58).
• Per CRAN request, order() is no longer called on data frames (#57).