Backport - Fix #721 - Improve detection: recognize OPPO Pad as tablet

(cherry picked from commit 8dce4cc514)

src/ua-parser.js

@@ -439,6 +439,8 @@
             /; (\w+) bui.+ oppo/i,
             /\b(cph[12]\d{3}|p(?:af|c[al]|d\w|e[ar])[mt]\d0|x9007|a101op)\b/i
             ], [MODEL, [VENDOR, 'OPPO'], [TYPE, MOBILE]], [
+            /\b(opd2\d{3}a?) bui\//i
+            ], [MODEL, [VENDOR, 'OPPO'], [TYPE, TABLET]], [
 
             // Vivo
             /vivo (\w+)(?: bui|\))/i,