Update zlib version to resolve build errors.

[ledsun]

Problem

ruby.wasm has been failing to build for the past week.
For example, the following GitHub Actions job:
https://github.com/ruby/ruby.wasm/actions/runs/5965503425/job/16183103917

Errors are as follows:

*** Following extensions are not compiled:
zlib:
	Could not be configured. It will not be installed.
	Check ext/zlib/mkmf.log for more details.
*** Fix the problems, then remove these directories and try again if you want.

Also, build/wasm32-unknown-wasi/head-wasm32-unknown-wasi-full-js-debug/ext/zlib/mkmf.log shows that ruby/zlib compilation fails because zlib.h is missing. The zlib referred to in this case is not the zlib installed on the system, but the zlib obtained by lib/ruby_wasm/build_system/product/zlib.rb.

Cause

zlib.rb tries to download zlib 1.2.13 from zlib.net. zlib.net distributes the latest zlib. 1.2.13 worked fine when it was up to date. zlib 1.3 was released and zlib 1.2.13 is no longer distributed.

Solution

Update zlib version to 1.3 to be downloaded in zlib.rb.

Of course this is not a radical solution. Once a new version of zlib is released, the same problem should occur again. Of course this is not a radical solution. Once a new version of zlib is released, the same problem should occur again. So, to make it easier to understand the cause of the build error, I have added an option to raise an exception when the zlib download fails.

Perhaps it would be better to check out the version from https://github.com/madler/zlib.