remove {} value wrapping for cs/cd

[ruslantalpa]

cs/cd operators are also useful when working with jsonb (not just arrays) so with the current handling one can only run queries like these because of the auto wrapping: SELECT '{1, 2, 3}'::integer[] @> '{2}';

if this is removed (and the lib user is required to format the value), they can now run queries like:

select '[1,2,3]'::jsonb @> '2'; select '[1,2,3]'::jsonb @> '[2,3]'; select '{1, 2, 3}'::integer[] @> '{2,3}';

because they are now in control of the value formatting.

[coveralls]

Pull Request Test Coverage Report for Build 7139007321

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.06%) to 89.216%

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Totals
Change from base Build 6618423233:	-0.06%
Covered Lines:	265
Relevant Lines:	276

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💛 - Coveralls