Bump thingpedia from 2.8.0-beta.2 to 2.8.0-beta.4

Bumps [thingpedia](https://github.com/stanford-oval/thingpedia-api) from 2.8.0-beta.2 to 2.8.0-beta.4.
- [Release notes](https://github.com/stanford-oval/thingpedia-api/releases)
- [Changelog](https://github.com/stanford-oval/thingpedia-api/blob/master/HISTORY)
- [Commits](stanford-oval/thingpedia-api@v2.8.0-beta.2...v2.8.0-beta.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -32,7 +32,7 @@
     "q": "^1.5.0",
     "serve-favicon": "^2.4.3",
     "sqlite3": "^5.0.0",
-    "thingpedia": "~2.8.0-beta.2",
+    "thingpedia": "~2.8.0-beta.4",
     "thingpedia-discovery": "^1.0.0",
     "thingtalk": "~1.11.0-beta.2",
     "uuid": "^8.2.0",

yarn.lock

@@ -3975,15 +3975,16 @@ thingpedia-discovery@^1.0.0:
   dependencies:
     node-ssdp "^2.7.2"
 
-thingpedia@~2.8.0-beta.1, thingpedia@~2.8.0-beta.2:
-  version "2.8.0-beta.2"
-  resolved "https://registry.yarnpkg.com/thingpedia/-/thingpedia-2.8.0-beta.2.tgz#94c35f7ea83075e6ee3bd426dfbedd70c58e4043"
-  integrity sha512-5mQHI77/cdBZ3o0E88wdapGaJrPkOfmVsiK5RWb8w5Y2jtoDrdOBqrrfrWcE/ple+6YsuxGTQIcXPQn1vrDgSw==
+thingpedia@~2.8.0-beta.1, thingpedia@~2.8.0-beta.4:
+  version "2.8.0-beta.4"
+  resolved "https://registry.yarnpkg.com/thingpedia/-/thingpedia-2.8.0-beta.4.tgz#ec3ea74df3fd0354943f807936b1cba827d34596"
+  integrity sha512-WKHNpWsadbOUodOV0/1PYH3aRIJDVAWW4vt7sSDJRao8cYHVa55PR2NWCZuNOiAKEw81zv27OiA1X48Cy3UrJg==
   dependencies:
     feedparser "^2.2.9"
     gettext-parser "^4.0.2"
     ip "^1.1.0"
     oauth "^0.9.14"
+    qs "^6.7.0"
     string-interp "^0.3.1"
     thingtalk "~1.11.0-beta.2"
     tmp "^0.2.1"