Convert utils and hashtags to Typescript #831

Job	Run time
build (production)	3m 47s
build (test)	3m 46s
End to End testing (3.0)	4m 38s
test (3.0)	8m 21s
End to End testing (3.1)	5m 16s
Elastic Search integration testing (3.0, docker.elastic.co/elasticsearch/elasticsearch:7.17.13)	2m 20s
test (3.1)	7m 16s
End to End testing (.ruby-version)	4m 54s
test (.ruby-version)	9m 7s
Elastic Search integration testing (3.1, docker.elastic.co/elasticsearch/elasticsearch:7.17.13)	2m 18s
Elastic Search integration testing (.ruby-version, docker.elastic.co/elasticsearch/elasticsearch:...	2m 27s
Elastic Search integration testing (.ruby-version, docker.elastic.co/elasticsearch/elasticsearch:...	2m 31s
	56m 41s

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