Fix enums in google-libphonenumber

Added enumeration for enums.

google-libphonenumber/index.d.ts

@@ -12,18 +12,18 @@ declare namespace libphonenumber {
     }
 
     export enum PhoneNumberType {
-        FIXED_LINE,
-        MOBILE,
-        FIXED_LINE_OR_MOBILE,
-        TOLL_FREE,
-        PREMIUM_RATE,
-        SHARED_COST,
-        VOIP,
-        PERSONAL_NUMBER,
-        PAGER,
-        UAN,
-        VOICEMAIL,
-        UNKNOWN
+        FIXED_LINE = 0,
+        MOBILE = 1,
+        FIXED_LINE_OR_MOBILE = 2,
+        TOLL_FREE = 3,
+        PREMIUM_RATE = 4,
+        SHARED_COST = 5,
+        VOIP = 6,
+        PERSONAL_NUMBER = 7,
+        PAGER = 8,
+        UAN = 9,
+        VOICEMAIL = 10,
+        UNKNOWN = -1
     }
 
     interface PhoneNumber {