Bump simplejson from 3.18.0 to 3.18.3 (#1992)

* Bump simplejson from 3.18.0 to 3.18.3

Bumps [simplejson](https://github.com/simplejson/simplejson) from 3.18.0 to 3.18.3.
- [Release notes](https://github.com/simplejson/simplejson/releases)
- [Changelog](https://github.com/simplejson/simplejson/blob/master/CHANGES.txt)
- [Commits](https://github.com/simplejson/simplejson/compare/v3.18.0...v3.18.3)

---
updated-dependencies:
- dependency-name: simplejson
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

* Update simplejson==3.18.3

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>

[skip ci]

lib/simplejson/encoder.py

@@ -32,6 +32,7 @@ ESCAPE_DCT = {
 for i in range(0x20):
     #ESCAPE_DCT.setdefault(chr(i), '\\u{0:04x}'.format(i))
     ESCAPE_DCT.setdefault(chr(i), '\\u%04x' % (i,))
+del i
 
 FLOAT_REPR = repr