Added recent data to the babynames project

[tpaxman]

Hi Hadley,

I have updated your babynames project to include recent information related to births and the life tables. The changes are summarized as follows:

• data-raw/births.R: I added the number of total births from 2018 (which appears to be the most recent data available since final values for 2019 have not yet been reported).
• data-raw/applicants.R: This was updated to get the html source page, which appears to have been changed since the last time this project was updated.
• data-raw/lifetables.R: I have updated this to now include the year 2020.

I have added a few small changes for clarity and also ran the scripts to ensure that the .csv and .rda files corresponding to the changed .R files were also updated. I hope you find these of use. Thanks.

Best Regards,

Tyler Paxman

[tpaxman]

Hi Hadley,
It appears as though the pull request check failed since it expects to have the same sample outputs when run. However, since my addition included more recent years (post-2017) that appears to have caused the checks to fail.

[elinw]

It would be great to have this update! I was just coming to ask if there would be interest in that.

[tylerpaxman]

@elinw feel free to fork my branch. The update should have worked there at least.