Dvc

1) [Fixed warning in `dvc version`](https://github.com/iterative/dvc/commit/a0d364e78ad0ad5d10e30017829409d348f3c5f3);
2) [Removing leading `/` in `dvc import/get` path argument](https://github.com/iterative/dvc/pull/2651); Kudos SrividyaKK :tada:
3) [Added `--all-commits` support for `dvc gc`](https://github.com/iterative/dvc/pull/2643);
4) [Optimized fetching of imports from external repos](https://github.com/iterative/dvc/pull/2654);
5) [Fixed bug in directory cache collection](https://github.com/iterative/dvc/pull/2656);

1) [Fixed import order](https://github.com/iterative/dvc/pull/2636); Kudos Naba7 :tada:
2) [Disable progress bar when output is not a TTY](https://github.com/iterative/dvc/pull/2550);
3) [Deduplicate brancher entries](https://github.com/iterative/dvc/pull/2639);
4) [Deduplicate used cache entries](https://github.com/iterative/dvc/pull/2630);
5) [Fix bug in dvc repository lock that was making ~15 sec slow on Mac and on other systems with bad dns configuration](https://github.com/iterative/dvc/pull/2642);
6) [Fix bug in push/pull/status from http remote, which made dvc hit ulimit for opened file descriptors on Mac and Windows](https://github.com/iterative/dvc/pull/2646);

1) [Fixed extremely slow dvc repository locks caused by a CPython bug](https://github.com/iterative/dvc/pull/2628);

1) [Fixed import order in `dvc/remote/base.py`](https://github.com/iterative/dvc/pull/2626); Kudos sofia100 :tada:
2) [Fixed import order in `dvc/__init__.py`](https://github.com/iterative/dvc/pull/2618); Kudos aloks98 :tada:
3) [Fixed bug in our progress bars on tiny terminals](https://github.com/iterative/dvc/issues/2598);

1) [Don't set default user when connecting to hdfs](https://github.com/iterative/dvc/pull/2622);

1) [Refactored repo lock logic](https://github.com/iterative/dvc/pull/2590);
2) [Caching cloned external repos for `dvc import`](https://github.com/iterative/dvc/pull/2583);
3) [Fixed our bash completion scripts for `dvc import-url` and `get-url` commands](https://github.com/iterative/dvc/pull/2596);
4) [Resetting dvcignore when reloading the DAG](https://github.com/iterative/dvc/pull/2604);
5) [Avoiding creating cache directory until we actually need it](https://github.com/iterative/dvc/pull/2597);
6) [Reduced verbosity of `dvc add`](https://github.com/iterative/dvc/pull/2607);
7) [Made help messages have consistent case](https://github.com/iterative/dvc/pull/2591); Kudos Hiyorimi :tada:
8) [Fixed bug in `import/get/import-url/get-url` commands, that caused incorrect output path resolution](https://github.com/iterative/dvc/pull/2610);
9) [Fixed logger to put warnings into stderr instead of stdout](https://github.com/iterative/dvc/pull/2612);
10) [Updated requirements for pyinstaller version](https://github.com/iterative/dvc/pull/2615);