fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-DEBUG-3227433

Author: snyk-bot

package.json

@@ -10,7 +10,7 @@
 	},
 	"dependencies": {
 		"react": "16.0.0",
-		"react-native": "0.47.2"
+		"react-native": "0.63.0"
 	},
 	"devDependencies": {
 		"@types/jest": "20.0.8",