Revert "Dependency updates. (#14033)" (#14304)

This reverts commit f14c79f170.

vendor/github.com/jaytaylor/html2text/.travis.yml

@@ -1,12 +1,13 @@
 language: go
 go:
-  # n.b. For golang release history, see https://golang.org/doc/devel/release.html
   - tip
-  - "1.13.8"
-  - "1.12.17"
-  - "1.11.13"
-  - "1.10.8"
-  - "1.9.7"
+  - 1.8
+  - 1.7
+  - 1.6
+  - 1.5
+  - 1.4
+  - 1.3
+  - 1.2
 notifications:
   email:
     on_success: change