https://oss-fuzz.com/testcase-detail/5964400971874304
The original upng code this is based on just sizes the temp buffers for 15,
but the trees can come in 19, 32, or 288 lengths. Set the buffer sizes for
the worst case.
Add some asserts to help catch any further problems more directly.
The adapted upng has a very compact fully-stateful lws-aligned
implementation already.
Adapt it to also be buildable and operable standalone, and to
understand gzip headers.
Provide some apis to inflate gzip simply reusing opaque inflator
contexts from upng.
Provide an api test that inflates gzip files from stdin -> stdout
