v0.13.0 (tensorflow#1276)

v0.13.0 (tensorflow#1276)

v0.13.0 (tensorflow#1276)

v0.13.0 (tensorflow#1276)

v0.13.0 (tensorflow#1276)

Update version to 0.12.18

bump version to v0.12.17 (tensorflow#1266)

This release fixes the TypeScript declaration file error from the last release.

bump version 0.12.15 --> 0.12.16 (tensorflow#1262)

Bump version: 0.12.14 --> 0.12.15 (tensorflow#1251)

Update version to 0.12.14