Add specialization for Bool type
Add specialization for Bool type

trigrass2/ffjson,xiuzhifu/ffjson,xladykiller/ffjson,cw2018/ffjson,sunminghong/ffjson,trigrass2/ffjson,xyliuke/ffjson,cmeon/ffjson,sunminghong/ffjson,pquerna/ffjson,jamesliu96/ffjson,cw2018/ffjson,xyliuke/ffjson,cmeon/ffjson,xladykiller/ffjson,pquerna/ffjson,jamesliu96/ffjson,xiuzhifu/ffjson