chore(deps): bump envier from 0.5.0 to 0.5.1

Bumps [envier](https://github.com/DataDog/envier) from 0.5.0 to 0.5.1.
- [Release notes](https://github.com/DataDog/envier/releases)
- [Commits](DataDog/envier@v0.5.0...v0.5.1)

---
updated-dependencies:
- dependency-name: envier
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/deploy.txt

@@ -88,9 +88,9 @@ deprecated==1.2.14 \
     --hash=sha256:6fac8b097794a90302bdbb17b9b815e732d3c4720583ff1b198499d78470466c \
     --hash=sha256:e5323eb936458dccc2582dc6f9c322c852a775a27065ff2b0c4970b9d53d01b3
     # via opentelemetry-api
-envier==0.5.0 \
-    --hash=sha256:5fed6099ee5d7ad4cf664f8bb99d1281d4ab5fadeec8f40ba9458610938293be \
-    --hash=sha256:f35ca8605f0c70c2c0367133af9dc1ef16710021dbd0e28c1b0a83070db06768
+envier==0.5.1 \
+    --hash=sha256:b45ef6051fea33d0c32a64e186bff2cfb446e2242d6781216c9bc9ce708c5909 \
+    --hash=sha256:bd5ccf707447973ea0f4125b7df202ba415ad888bcdcb8df80e0b002ee11ffdb
     # via ddtrace
 gunicorn==21.2.0 \
     --hash=sha256:3213aa5e8c24949e792bcacfc176fef362e7aac80b76c56f6b5122bf350722f0 \