hamming: syntax error

[bitfield]

The analyser is dying here: https://exercism.io/mentor/solutions/72286d2cc829439ab0dfb0fb33cc818b — Unfortunately there is a syntax error in this solution. This causes the tests to fail, which can be verified by running the tests in a terminal with go test.`

[tehsphinx]

For myself: check if initialising go modules and using go mod download beforehand solves the problem, that non-standard library imports tend to "crash" the analyzer.