Prelease 1.1.2rc (#5171)

* update CHANGELOG.md, increment for RC

* Add missing changelog update

* Added a few more

* Move to added

* Address code review

* Missing space

* Remove unreleased

* Remove lines

* Update CHANGELOG.md

Co-authored-by: Rohit Gupta <rohitgr1998@gmail.com>

CHANGELOG.md

@@ -56,6 +56,43 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Fixed `DDPHPCAccelerator` hangs in DDP construction by calling `init_device` ([#5157](https://github.com/PyTorchLightning/pytorch-lightning/pull/5157))
 
 
+## [1.1.2rc1] - 2020-12-17
+
+### Added
+
+- Support number for logging with `sync_dist=True` ([#5080](https://github.com/PyTorchLightning/pytorch-lightning/pull/5080)
+
+
+### Changed
+
+
+### Deprecated
+
+
+### Removed
+
+- `enable_pl_optimizer=False` by default to temporarily fix AMP issues ([#5163](https://github.com/PyTorchLightning/pytorch-lightning/pull/5163)
+
+
+### Fixed
+
+- Metric reduction with Logging ([#5150](https://github.com/PyTorchLightning/pytorch-lightning/pull/5150)
+
+
+- Remove nan loss in manual optimization ([#5121](https://github.com/PyTorchLightning/pytorch-lightning/pull/5121)
+
+
+- Un-balanced logging properly supported ([#5119](https://github.com/PyTorchLightning/pytorch-lightning/pull/5119)
+
+
+- Fix hanging in DDP HPC accelerators ([#5157](https://github.com/PyTorchLightning/pytorch-lightning/pull/5157)
+
+
+- Fix saved filename in `ModelCheckpoint` if it already exists ([#4861](https://github.com/PyTorchLightning/pytorch-lightning/pull/4861)
+
+
+- Fix reset `TensorRunningAccum` ([#5106](https://github.com/PyTorchLightning/pytorch-lightning/pull/5106)
+
 
 ## [1.1.1] - 2020-12-15