CSV appends: integer columns should be convertable to float

[calherries]

Integer columns in an upload table should be converted to a floating-point type if the uploaded column in the CSV file contains a floating-point number.

• Test: if a column is an integer type, uploading a single float should convert the column to float

[ojjj13]

In the same manner a column should converted to int/float when it has one, when I was uploading csv to metabase I always get "xx is not a boolean value" with a column start with a bunch of 0 and 1s follow by a random number.

[calherries]

Some slack discussion