Bump version to v1.4.5 (open-mmlab#1716)

bump version to v1.4.4 (open-mmlab#1686)

[Fix] Fix the compilation error on windows (open-mmlab#1657)

bump version to v1.4.2 (open-mmlab#1609)

bump version to v1.4.1 (open-mmlab#1585)

Fix install from pip (open-mmlab#1544)

bump version to v1.3.18 (open-mmlab#1519)

bump version to v1.3.17 (open-mmlab#1473)

* bump version to v1.3.17

* add a document to record the previous versions of PyTorch built for mmcv-full

* polish readme

bump version to v1.3.16 (open-mmlab#1430)

bump version to v1.3.15 (open-mmlab#1408)