Check: Invalid date format

On columns that specify a datetime or date, warn of an invalid date. We should also do this on date and time functions,

Sample output:

Invalid date '45/67/2018' specified for column 'purchase_date'

Invalid date '45/67/2018' given for call to 'DATEDIFF'

[x] - Create a new directory src/syntax. The syntax directory should be responsible for holding all keywords, functions, operators etc... of the language
[x] - Move Keywords.ts into this directory
[x] - Create a new directory src/syntax/{driver}/functions/datetime/
[x] - Create a file in here src/syntax/{driver}/functions/datetime/functions.ts

Note the {driver} part of the path. This can be any valid driver supported by sql-lint, for now, just do mysql.

joereynolds / sql-lint