Non-string assertions are broken

[wI2L]

Because the type ExecutorResult is a map[string]string under the hood, the assertions that expect numeric, boolean, struct.. types are broken.

For example:

assertion: result.bodyjson.__len__ ShouldBeGreaterThanOrEqualTo '8' Expected '17' to be greater than or equal to '8' (but it wasn't)!

Moreover, some assertions like ShouldContainKey which expect a struct as its first argument is basically unusable since the package github.com/fsamin/go-dump does not dump the root element of a JSON node:

result.bodyjson.bodyjson0 ShouldContainKey field_name
key 'result.bodyjson.bodyjson0' does not exist in result of executor

[wI2L]

assertion: result.bodyjson.created_at ShouldHappenAfter 2017-10-17T11:31:31Z You must provide time instances as arguments to this assertion