fix: malloc error
debug: update debug messages
Specify DecimalDigits when binding param"
fix-attempt: in the case of type double binding params, set decimals to 7.

This is probably a terrible idea, but so far MSSQL drivers don't work
any other way. While MySQL and Sqlite seem to ignore this value because
it does not effect the precision of the input.
0.5.19
Merge branch 'v0.5'