Added searchExpressions and Group joins support

[andreysmyntyna]

Which issue this PR fixes

Adds ability of grouping joined fields and utilizing filter expressions (OR\AND operators). Options are switched off by default.

Special notes for your reviewer:
required by netsuite-crm-integration
Original code for grouping has been taken from acumenbrands#31
and simplified a bit

Could be used like this

        const query = {
            record_type: recordType,
            batch_size: 5000,
            lower_bound: -9999,
            search_filters: searchFilters,
            search_columns: searchColumns,
            **advanced_options: {
                useFilterExpressions: true,
                groupJoins: true
            })**
        };