NOREF Escape forward slash in queries

There was a single character not being escaped that is a Lucene special character - forward slash. This caused a very small subset of queries to fail and this adds it to the escaped character regex to prevent this from happening in the future.

api/elastic.py

@@ -170,7 +170,7 @@ def makeDictHashable(cls, object):
 
     @staticmethod
     def escapeSearchQuery(query):
-        return re.sub(r'[\+\-\&\|\!\(\)\[\]\{\}\^\~\?\:\\]{1}', '\\\\\g<0>', query)
+        return re.sub(r'[\+\-\&\|\!\(\)\[\]\{\}\^\~\?\:\\\/]{1}', '\\\\\g<0>', query)
 
     def languageQuery(self, workTotals):
         search = self.createSearch()

tests/unit/test_api_es.py

@@ -429,7 +429,7 @@ def test_makeDictHashable(self, mocker):
         )
 
     def test_escapeSearchQuery_changed(self):
-        assert ElasticClient.escapeSearchQuery('[test]+a:thing!') == '\[test\]\+a\:thing\!'
+        assert ElasticClient.escapeSearchQuery('/[test]+a:thing!') == '\/\[test\]\+a\:thing\!'
 
     def test_escapeSearchQuery_unchanged(self):
         assert ElasticClient.escapeSearchQuery('a simple query') == 'a simple query'