fix: upgrade Facebook SDK (#1105)

Author: sommye-ctr

facebook/build.gradle

@@ -27,10 +27,10 @@ android {
 }
 
 dependencies {
-    api "com.facebook.android:facebook-login:6.3.0"
+    api "com.facebook.android:facebook-login:8.2.0"
     implementation project(":parse")
 
     testImplementation "junit:junit:4.13.2"
     testImplementation "org.mockito:mockito-core:3.9.0"
     testImplementation "org.robolectric:robolectric:4.6"
-}
+}