fix: import error if x520 field contains newline

abcddb2vcard/ABCDDB.py

@@ -26,7 +26,7 @@ def incrItem(value: str, label: str) -> str:
 def x520(val: str) -> Optional[str]:
     if not val:
         return None
-    return val.replace(';', '\\;').replace(',', '\\,')
+    return val.replace(';', '\\;').replace(',', '\\,').replace('\n', '\\n')
 
 
 def buildLabel(

abcddb2vcard/__init__.py

@@ -2,6 +2,6 @@
 '''
 Convert AddressBook database (.abcddb) to Contacts VCards file (.vcf)
 '''
-__version__ = '1.1.0'
+__version__ = '1.1.1'
 
 from .ABCDDB import ABCDDB