chore(deps): Bump bottle from 0.12.13 to 0.12.20 in /tests/base

Bumps [bottle](https://github.com/bottlepy/bottle) from 0.12.13 to 0.12.20.
- [Release notes](https://github.com/bottlepy/bottle/releases)
- [Changelog](https://github.com/bottlepy/bottle/blob/master/docs/changelog.rst)
- [Commits](bottlepy/bottle@0.12.13...0.12.20)

---
updated-dependencies:
- dependency-name: bottle
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tests/base/requirements-w-hashes.txt

@@ -11,9 +11,9 @@ botocore==1.12.50 \
     --hash=sha256:07fae5a2b8cfb5a92c1dbee3f2feb4da7c471bcead7e18ce735babe5f39e270f \
     --hash=sha256:eeaa190f50ee05a56225ee78c64cb8bf0c3bf090ec605ca6c2f325aa3826a347 \
     # via boto3, s3transfer
-bottle==0.12.19 \
-    --hash=sha256:f6b8a34fe9aa406f9813c02990db72ca69ce6a158b5b156d2c41f345016a723d \
-    --hash=sha256:a9d73ffcbc6a1345ca2d7949638db46349f5b2b77dac65d6494d45c23628da2c
+bottle==0.12.20 \
+    --hash=sha256:3c97e1e955c11e4ad2d73a60cdf83c4f4cf7b8b73c8344fc4b72f985432605cb \
+    --hash=sha256:544023cd2cd6d382ebf9675fa0544d4d20e19d3a13b6932a812d099fb2f6cb84
 click==7.0 \
     --hash=sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13 \
     --hash=sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7 \