TestIsFloat64AJSONInteger fails now that Go 1.17 has corrected math.SmallestNonzeroFloat64

[anthonyfok]

Running go test ./... with Go 1.17 with the following error:

--- FAIL: TestIsFloat64AJSONInteger (0.00s)
    convert_test.go:212: 
        	Error Trace:	convert_test.go:212
        	Error:      	Should be false
        	Test:       	TestIsFloat64AJSONInteger

on line 212 of convert_test.go:

swag/convert_test.go

Line 212 in a879606

assert.False(t, IsFloat64AJSONInteger(math.SmallestNonzeroFloat64/2))

It turns out that math.SmallestNonzeroFloat64 / 2 is supposed to return 0 (hence an integer), but before Go 1.17, the value of math.SmallestNonzeroFloat64 was not sufficiently precise, thus returning a non-zero non-integer.

Please see:

• math: math.SmallestNonzeroFloat64 is not sufficiently precise, leading to unexpected results golang/go#44058
• https://play.golang.org/p/TW9A24cAghT

for more information.

Many thanks!