Release 0.18.0

Major Features

• GCS modular file system is now part of the tensorflow-io-gcs-filesystem package.
• S3 and HDFS modular file systems can be enabled with TF_USE_MODULAR_FILESYSTEM=1.
• Add python 3.9 support on macOS, Linux, and Windows.
• Add initial wavefront/obj parser for 3D vertices.
• Move tfio.experimental.audio to tfio.audio.
• Add https file system registration.
• Add FFmpeg support on macOS.
• Add 16 bit TIFF support.

Thanks to our Contributors

This release contains contributions from many people:

Cheng Ren, Dale Lane, Irene Onyeneho, Keqiu Hu, Kota Yamaguchi,
Mark Daoust, Vignesh Kothapalli, Vo Van Nghia, Yong Tang,
Yuan Tang, markemus

We are also grateful to all who filed issues or helped resolve them, asked and
answered questions, and were part of inspiring discussions.