这个词典的解析存在问题，请先不要使用这个词典，后续会修复：
panic: runtime error: slice bounds out of range [:20361] with capacity 4096
goroutine 156 [running]:
github.com/terasum/medict/internal/gomdict.bigEndianBinToUTF8({0x14000ccd000, 0xcf8, 0x1000}, 0x47, 0x4f42)
/Users/chenquan/Workspace/go/src/github.com/terasum/medict/internal/gomdict/util.go:53 +0x160
github.com/terasum/medict/internal/gomdict.(*MdictBase).decodeKeyBlockInfo(0x140002f6f00, {0x140001cc000, 0x60f, 0x60f})
/Users/chenquan/Workspace/go/src/github.com/terasum/medict/internal/gomdict/mdict_base.go:404 +0x6d8
github.com/terasum/medict/internal/gomdict.(*MdictBase).ReadKeyBlockInfo(0x140002f6f00)
/Users/chenquan/Workspace/go/src/github.com/terasum/medict/internal/gomdict/mdict_base.go:298 +0x1dc
github.com/terasum/medict/internal/gomdict.(*Mdict).BuildIndex(0x14000480050)
/Users/chenquan/Workspace/go/src/github.com/terasum/medict/internal/gomdict/mdict.go:64 +0x34