build: update textgrid-connect-standalone

Michelle Weidlingrequested to merge
update-textgrid-connect-standalone into develop

This MR upgrade textgrid-connect-standalone to version 2.0.0 which is completely independent from SPARQL.

This step is necessary since TextGrid's triplestore seems to have some error which results in already deleted resources being returned. The REST interface which is used in textgrid-connect-standalone does not have this problem.

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