1.4 CRAN release

In version 1.4:

• get_decennial() has been updated to accommodate the new Demographic and Housing Characteristics and Demographic Profile summary files. Use sumfile = "dhc" for the DHC file, and sumfile = "dp" for the DP file.
• The default year in get_decennial() is now 2020. This may be a breaking change for some legacy code that omits the year, so be sure to update scripts to hard-code the year for years earlier than 2020.
• sumfile = "pl" is the default for get_decennial() and will remain so to avoid existing code breakages. Please note that variable IDs are replicated across the PL and DHC files, but may represent different topics.
• get_estimates() now supports the 2020, 2021, and 2022 Population Estimates. These datasets are not on the Census API, so tidycensus downloads and parses the flat files.

1.0 CRAN release

fix all problem URLs