MM-31436: Upgrade dependencies (#16605)

* MM-31436: Upgrade dependencies

Ran make update-dependencies

https://mattermost.atlassian.net/browse/MM-31436

```release-note
NONE
```

* add missing dep

* fix lru marshaling

vendor/github.com/araddon/dateparse/go.mod

@@ -0,0 +1,9 @@
+module github.com/araddon/dateparse
+
+go 1.12
+
+require (
+	github.com/mattn/go-runewidth v0.0.9 // indirect
+	github.com/scylladb/termtables v0.0.0-20191203121021-c4c0b6d42ff4
+	github.com/stretchr/testify v1.6.1
+)