Replace SDL 1 with SDL 2.

Using vcpkg, building wheels via our CI should be useful.

This warning was raised when compiling the MixStream extension:

fretwork/mixstream/MixStream.c: In function ‘mix_stream_destroy’:
fretwork/mixstream/MixStream.c:135:3: warning: ‘g_mutex_free’ is deprecated (declared at /usr/include/glib-2.0/glib/deprecated/gthread.h:275) [-Wdeprecated-declarations]

As we're using glib 2.34.3+, g_mutex_free can be removed or replaced by g_mutex_clear.
Eventually, we can add a condition on the version of glib.

This warning was raised when compiling the MixStream extension:

fretwork/mixstream/MixStream.c: In function ‘mix_stream_new’:
fretwork/mixstream/MixStream.c:119:3: warning: ‘g_mutex_new’ is deprecated (declared at /usr/include/glib-2.0/glib/deprecated/gthread.h:273) [-Wdeprecated-declarations]

As we're using glib 2.34.3+, g_mutex_new can be removed.
See https://developer.gnome.org/glib/stable/glib-Threads.html#GMutex for how it should be.
Eventually, we can add a condition on the version of glib.

This warning was raised when compiling the MixStream extension:

fretwork/mixstream/MixStream.c: In function ‘mix_stream_new’:
fretwork/mixstream/MixStream.c:75:5: warning: ‘g_thread_init’ is deprecated (declared at /usr/include/glib-2.0/glib/deprecated/gthread.h:261) [-Wdeprecated-declarations]

As we're using glib 2.34.3+, g_thread_init can be removed.
Eventually, we can add a condition on the version of glib.

GStaticMutex is deprecated. GMutex should be used instead: https://docs.gtk.org/glib/union.Mutex.html.

Hi, @Linkid , I'd like to report a vulnerability issue in mixstream_1.1.0.

Dependency Graph between Python and Shared Libraries

Issue Description

As shown in the above dependency graph (Here shows part of the dependency graph, which depends on vulnerable shared libraries), mixstream_1.1.0 directly or transitively depends on 5 C libraries (.so). However, I noticed that one C library is vulnerable, containing the following CVE:
libvorbisfile-c5d289a9.so.3.3.5from C project libvorbis(version:1.3.2) exposed 1 vulnerability:
CVE-2020-20412

Suggested Vulnerability Patch Versions

libvorbis has fixed the vulnerabilities in versions >=1.3.6

Python build tools cannot report vulnerable C libraries, which may induce potential security issues to many downstream Python projects.
As a popular python package (mixstream has 1,887 downloads per month), could you please upgrade the above shared libraries to their patch versions?

Thanks for your help~
Best regards,
Jor Gardner

This warning was raised when compiling the MixStream package:

mixstream/MixStream.c: In function ‘mix_stream_play’:
mixstream/MixStream.c:355:3: warning: ‘g_memdup’ is deprecated. Use 'g_memdup2' instead [-Wdeprecated-declarations]

g_memdup is deprecated since GLib 2.68.

The pytest-runner lib is deprecated: https://github.com/pytest-dev/pytest-runner//issues/50.