- 12/23/2020: version 1.2.0
  * API changes:
    - libwebp:
      encode.h: add a qmin / qmax range for quality factor (cwebp adds -qrange)
  * lossless encoder improvements
  * SIMD support for Wasm builds
  * add xcframeworkbuild.sh, supports Mac Catalyst builds
  * import fuzzers from oss-fuzz & chromium (#409)
  * webpmux: add an '-set loop <value>' option (#494)
  * toolchain updates and bug fixes (#449, #463, #470, #475, #477, #478, #479,
    #488, #491)