Change query and/or to instance method to keep query non-predicate properties when joining predicates

[Steven-Chan]

The current function signature is

static function or(...queries)
static function and(...queries)

I suggest to change it to

function or(...queries)
function and(...queries)

// for backward compatibility
static function or(baseQuery, ...queries)
static function and(baseQuery, ...queries)

Example:

const query = new Query(xxx);
query.limit = 10;

const orQuery = query.or(xxx);
// or
const orQuery = Query.or(query, xxxx);

assert orQuery.limit === 10
// while in current implementation, orQuery.limit would be the default one

The new function signature looks more predictable,

• this function does not work on empty query array
• the original function does not tell how the function treat non-predicate properties