Update README.md

Merge pull request #202 from BradleyMarie/patch-1

Remove const from outbuf

fix `marker` pointer address can be decremented by `int` dataSize.

Add bounds check. Fixes #197

Fix wrong variable was used in the loop. Causing potential memory leaks.

Issue found by Code scanning: https://github.com/syoyo/tinyexr/security/code-scanning/105

Fix compile.

Fix PIZ decoding when image tile(bitmap) is composed of all black pix…

…els. Fixes #194

Merge pull request #185 from NeilBickford-NV/neilbickford/memory-mapp…

…ed-file-and-fixes

Adds usage of memory-mapping where available to read files; fixes some handle leaks; improves C  98-compatibility

Cosmetics on documentation.

Bump copyright year.