add failing test
literals of arraylit / maplit should be considered as RHS so that implicit conversions would be applied
test should cover the use of: "{ ... } : variant"
element type if variant in case of "{ ... } : variant"
update t/run/188, expressions in map/array literals are now type-checked
Merge branch 'kazuho/issues/overflow-in-complit-of-int' into release-branch-since-v0.9.85