Problem with TCU (Towering cumulus) in cloud layer

[Foxi352]

Hi,

I wanted to use your library for a personal project. I am new in GO and these are my first steps.

Sadly it seems that the modules has a problem with the TCU (Towering cumulus) part of the cloud layer given the following METAR:

ELLX 021550Z 06008KT 9999 VCSH FEW051TCU 17/06 Q1015 NOSIG

panic: runtime error: index out of range [10] with length 10

goroutine 1 [running]:
github.com/eugecm/gometar/metar/parser.(*Parser).Parse(_, {_, _})
        /Users/swagener/go/pkg/mod/github.com/eugecm/gometar@v0.0.0-20191013165408-b5d7ae8fbd5e/metar/parser/parser.go:124 +0xeee
main.main()
        /Users/swagener/git/vatsim-companion/metar.go:45 +0x12b
exit status 2

If i remove TCU part from the FEW051TCU string it works.