UseDoubleForLargeNumbers may be too strict

[timhall]

(see VBA-tools/VBA-Web#234)

The value 1234567890.12345 has 15 significant digits (and will display in Excel 2016 without truncation) but has length = 16 because the decimal adds to the length without altering the significance. Perhaps test for "." in the json_Value string and allow for 17 characters with a decimal and 16 without?