v0.6.0
New setting enableLogicalOperators to control if user specified logical operators (and/or/not) should be processed in the search queries like "cat and dog". The default value is false, so logical operators are not processed and the words are treated as literal strings.
Before the release v0.6.0 there hasn't been a setting to control the processing of logical operators. The default behaviour was to process them, so to keep your existing app's behaviour intact, enable the new setting:
client.enableLogicalOperators(true);