Cant migrate tables with text column unique keys

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When running a DDL to migrate a table with a text column that is a unique key gh-ost fails to apply update DML events.
It fails in the updateModifiesUniqueKeyColumns function in applier.go method. That is because text columns are mapped to unit8[] slices which cannot be compared using '!=':

gh-ost/go/logic/applier.go

Line 1301 in 7cc7cc8

if newColumnValue != whereColumnValue {

That leads to a connection close and then no more DML events are handled for the table anymore.

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go mysql type mapping: go-mysql-org/go-mysql#770