upgrade: resin-corvus to v1.0.0-beta.31 (#1902)

This version contains a couple of patches to ensure that the Mixpanel
library doesn't send any HTTP request to api.mixpanel.com unless the
user enabled analytics.

- balena-io-modules/resin-corvus#35
- balena-io-modules/resin-corvus#36

See: #1772
Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>

package.json

@@ -81,7 +81,7 @@
     "request": "2.81.0",
     "resin-cli-form": "1.4.1",
     "resin-cli-visuals": "1.3.1",
-    "resin-corvus": "1.0.0-beta.30",
+    "resin-corvus": "1.0.0-beta.31",
     "semver": "5.1.1",
     "speedometer": "1.0.0",
     "sudo-prompt": "8.0.0",