Bump torch from 1.8.1 to 1.9.0 (#45)

Bumps [torch](https://github.com/pytorch/pytorch) from 1.8.1 to 1.9.0.
- [Release notes](https://github.com/pytorch/pytorch/releases)
- [Changelog](https://github.com/pytorch/pytorch/blob/master/RELEASE.md)
- [Commits](pytorch/pytorch@v1.8.1...v1.9.0)

---
updated-dependencies:
- dependency-name: torch
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

poetry.lock

@@ -17,7 +17,7 @@ keywords = ["time-series", "machine-learning", "pytorch"]
 
 [tool.poetry.dependencies]
 python = ">=3.7,<3.10"
-torch = "^1.8.1"
+torch = "^1.9.0"
 pytorch-lightning = "^1.3.5"
 scipy = "^1.7.0"