Truncate an CSV column using CsvKit

How can I truncate the length of a column using CSVKit? The definition looks like this: * Column 1: no length restriction * Column 2: This should properly handle escaped (quoted) columns and new lines. For example:

First Header,Second Header
foo,
foo,b
foo,bar
foo,"bar"
foo,"""bar"
foo,"
bar"

should become

First Header,Second Header
foo,
foo,b
foo,ba
foo,ba
foo,"""b"
foo,"
b"