Tests Handlebars

Update gofiber/template to v1.8.3 #112

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Run time

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Job	Run time
Tests (1.17.x, ubuntu-latest)	23s
Tests (1.17.x, windows-latest)	40s
Tests (1.18.x, ubuntu-latest)	21s
Tests (1.18.x, windows-latest)	47s
Tests (1.19.x, ubuntu-latest)	26s
Tests (1.19.x, windows-latest)	2m 4s
Tests (1.20.x, ubuntu-latest)	25s
Tests (1.20.x, windows-latest)	1m 27s
Tests (1.21.x, ubuntu-latest)	42s
Tests (1.21.x, windows-latest)	1m 35s
Tests (1.22.x, ubuntu-latest)	37s
Tests (1.22.x, windows-latest)	1m 19s
	10m 46s