Bump finplot from 1.7 to 1.9.2

Bumps [finplot](https://github.com/highfestiva/finplot) from 1.7 to 1.9.2.
- [Commits](highfestiva/finplot@v1.7...v1.9.2)

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

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

requirements.txt

@@ -2,7 +2,7 @@ ta==0.7.0
 python_binance==0.7.5
 pandas==1.2.4
 pyqtgraph==0.12.1
-finplot==1.7
+finplot==1.9.2
 binance==0.3
 numpy==1.21.2
 PyQt5==5.15.4