Use proxy for fetching link meta (#716)

* Use proxy for fetching link meta

* Remove link meta test due to hitting proxy

* setup different staging and prod proxy URLs

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Co-authored-by: Ansh Nanda <anshnanda10@gmail.com>
Co-authored-by: Paul Frazee <pfrazee@gmail.com>

package.json

@@ -85,7 +85,6 @@
     "expo-updates": "~0.16.4",
     "fast-text-encoding": "^1.0.6",
     "graphemer": "^1.4.0",
-    "he": "^1.2.0",
     "history": "^5.3.0",
     "js-sha256": "^0.9.0",
     "lande": "^1.0.10",