fixes PyMySQL#137

Add typecheck to `_mysql.result()`

using homebrew

- Based on PyMySQL#106 but now disabled by default
- Can be enabled via 'binary_prefix' connection parameter
- Added unit tests to verify behaviour

* set mysql password
* add mysql to services

Random fail happens on container based image.

GPL-2.0 was removed in b6601fe

Don't touch MYSQL.reconnect directly.

fixes PyMySQL#187

fixes PyMySQL#197

Since Connections.encoders is broken by design.
Tuple and list is escaped directly in `Connection.literal()`.
Removed tuple and list from converters mapping.

Fixes PyMySQL#145

Before *Most* string fields were passed to custom converter functions as "bytes",
everything else was assumed to be valid encoded utf-8 and passed as str.
This could cause issues where some unknown field was not valid utf-8 and
a decode error is triggered where it can't be fixed or avoided by the
end user.

Instead we should short list those fields that we know for sure have to
be str type because the existing converters expect it to be that way.
So all the date conversions, and (NEW)DECIMAL since the python decimal
type will not accept bytes object.

Everything else stays bytes, which is the least suprising and safest
thing to do.

Fixes PyMySQL#400.

Closes PyMySQL#416

Users of gc.get_referrers() could cause a SystemError to be raised if this function is running in a different python thread.

…into MMA-3573