MMCV Release V1.3.4

New Features

• Support corner_pool related custom operators for onnxruntime (#997)
• Support custom operators cummax and cummin for onnxruntime (#1010)
• Add StepMomentumUpdaterHook (#1011)
• Add pixel group and contour expand ops (#993)
• Add custom hook by config file (#970)

Improvements

• Add test util for checking stand-alone python scripts (#1007)
• Add triangular policy in CyclicLrUpdaterHook (#1001)
• Load hook_msgs when resume checkpoint (#962)
• Update weight initialization in cnn.md (#912)

Bug Fixes

• Fix DCN fp16 (#1014)
• Fix basemodule (#1018)
• Fix softnms (#1019)
• Fix wrong iter number and progress number in the logging during val/test time #914
• Read in rb mode then decode (#983)