[MIRROR] Drops ie8 support #2157

Job	Run time
Run Linters	3m 52s
Collect data for other tasks	14s
Compile Maps	4m 33s
Windows Build	11m 50s
Integration Tests (birdshot) / run_integration_tests	12m 17s
Integration Tests (blueshift) / run_integration_tests	13m 12s
Integration Tests (deltastation) / run_integration_tests	12m 19s
Integration Tests (gateway_test) / run_integration_tests	13m 57s
Integration Tests (icebox) / run_integration_tests	12m 39s
Integration Tests (kilostation2) / run_integration_tests	12m 0s
Integration Tests (multiz_debug) / run_integration_tests	11m 7s
Integration Tests (northstar) / run_integration_tests	12m 46s
Integration Tests (metastation) / run_integration_tests	12m 17s
Integration Tests (nssjourney) / run_integration_tests	11m 51s
Integration Tests (runtimestation) / run_integration_tests	10m 47s
Integration Tests (tramstation) / run_integration_tests	12m 5s
Integration Tests (voidraptor) / run_integration_tests	11m 51s
Alternate Tests (515, 1603, runtimestation) / run_integration_tests	9m 53s
Check Alternate Tests	1s
Compare Screenshot Tests	3m 6s
	3h 12m 37s

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