Update vcrpy requirement from ~=4.0.2 to ~=4.1.0 (#613)

Updates the requirements on [vcrpy](https://github.com/kevin1024/vcrpy) to permit the latest version.
- [Release notes](https://github.com/kevin1024/vcrpy/releases)
- [Changelog](https://github.com/kevin1024/vcrpy/blob/master/docs/changelog.rst)
- [Commits](kevin1024/vcrpy@v4.0.2...v4.1.0)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

requirements-dev.txt

@@ -2,7 +2,7 @@ coverage ~=5.1
 doctr ~=1.8.0
 pyflakes ~=2.2.0
 pytest ~=5.4.3
-vcrpy ~=4.0.2
+vcrpy ~=4.1.0
 doctr ~=1.8.0
 ipython ~=7.16.1
 matplotlib ~=3.2.2