Bug: queries on `FLOAT unsigned` columns fail

[Sh4pe]

I've noticed that queries containing columns of type FLOAT unsigned fail. I'm using MySQL.jl v1.1.2 and Julia 1.5.3.

To reproduce, create this MySQL table:

CREATE DATABASE test;
USE test;

CREATE TABLE test_float(x FLOAT unsigned);
INSERT INTO test_float VALUES (1.1), (1.2);

In order to reproduce the error, execute this minimal script:

using MySQL

# customize the credentials and server connection to your case, obviously ;)
conn =  DBInterface.connect(MySQL.Connection, "127.0.0.1", "root", "test", port=9999)
DBInterface.execute(conn, "select x from test.test_float")

The last command fails with this backtrace:

ERROR: MethodError: no method matching rem(::Type{Float32}, ::Type{UInt64})
Closest candidates are:
  rem(::Any, ::Any, ::RoundingMode{:ToZero}) at div.jl:67
  rem(::Any, ::Any, ::RoundingMode{:Down}) at div.jl:68
  rem(::Any, ::Any, ::RoundingMode{:Up}) at div.jl:69
  ...
Stacktrace:
 [1] unsigned(::Type{T} where T) at ./int.jl:188
 [2] juliatype(::UInt32, ::Bool, ::Bool, ::Bool) at /home/XXX/.julia/packages/MySQL/pLoSZ/src/MySQL.jl:305
 [3] #8 at ./none:0 [inlined]
 [4] iterate at ./generator.jl:47 [inlined]
 [5] collect(::Base.Generator{Array{MySQL.API.MYSQL_FIELD,1},MySQL.var"#8#11"}) at ./array.jl:686
 [6] execute(::MySQL.Connection, ::String, ::Tuple{}; mysql_store_result::Bool) at /home/XXX/.julia/packages/MySQL/pLoSZ/src/execute.jl:157
 [7] execute at /home/XXX/.julia/packages/MySQL/pLoSZ/src/execute.jl:133 [inlined] (repeats 2 times)
 [8] top-level scope at REPL[17]:3

[Sh4pe]

As a workaround for those affected by the bug as well, casting the column to FLOAT works, i.e. this command does work as expected:

# ...
DBInterface.execute(conn, "select cast(x as float) from test.test_float")