Bump ujson from 5.6.0 to 5.7.0

Bumps [ujson](https://github.com/ultrajson/ultrajson) from 5.6.0 to 5.7.0.
- [Release notes](https://github.com/ultrajson/ultrajson/releases)
- [Commits](ultrajson/ultrajson@5.6.0...5.7.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -6,6 +6,6 @@ Cython==0.29.32
 cyvcf2==0.30.18
 uvloop==0.17.0
 aiocache==0.11.1
-ujson==5.6.0
+ujson==5.7.0
 Authlib==1.2.0
 gunicorn==20.1.0

setup.py

@@ -46,7 +46,7 @@
         "uvloop==0.17.0",
         "cyvcf2==0.30.18",
         "aiocache==0.11.1",
-        "ujson==5.6.0",
+        "ujson==5.7.0",
     ],
     extras_require={
         "vcf": [