Update Go and packages to fix vulnerabilities #299

Job	Run time
Build httpd+cgi image	24s
Build server image	1m 23s
Build client image	1m 5s
Run test scripts (cert_handling.sh)	2m 18s
Run test scripts (cfengine.sh)	2m 2s
Run test scripts (change_ca.sh)	1m 53s
Run test scripts (client_timing.sh)	1m 53s
Run test scripts (clones.sh)	1m 40s
Run test scripts (powershell.sh)	2m 9s
Run test scripts (homepage.sh)	1m 45s
Publish httpd+cgi image	0s
Publish server image	0s
Tag and release	0s
	16m 32s

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