Bump scikit-image from 0.17.2 to 0.18.3

Bumps [scikit-image](https://github.com/scikit-image/scikit-image) from 0.17.2 to 0.18.3.
- [Release notes](https://github.com/scikit-image/scikit-image/releases)
- [Changelog](https://github.com/scikit-image/scikit-image/blob/main/RELEASE.txt)
- [Commits](https://github.com/scikit-image/scikit-image/compare/v0.17.2...v0.18.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -6,6 +6,6 @@ colorama==0.4.4
 tqdm==4.47.0
 ffmpeg-python==0.2.0
 Pillow==8.3.2
-scikit-image==0.17.2
+scikit-image==0.18.3
 h5py==3.1.0
 PyQt5==5.15.4

requirements_3.6.txt

@@ -6,6 +6,6 @@ colorama==0.4.4
 tqdm==4.47.0
 ffmpeg-python==0.2.0
 Pillow==8.3.2
-scikit-image==0.17.2
+scikit-image==0.18.3
 h5py==3.1.0
 PyQt5==5.15.4

requirements_3.9.txt

@@ -6,6 +6,6 @@ colorama==0.4.4
 tqdm==4.47.0
 ffmpeg-python==0.2.0
 Pillow==8.3.2
-scikit-image==0.18.0
+scikit-image==0.18.3
 h5py==3.1.0
 PyQt5==5.15.4