fix(client): handle more errors on Server Sent Event issues to better reflect what is going on #4284

Job	Run time
Installing & Building	3m 49s
Build API Reference	1m 9s
Lint commit messages	19s
Linting & Testing (agent)	1m 28s
Linting & Testing (datasource-customizer)	56s
Linting & Testing (datasource-dummy)	33s
Linting & Testing (datasource-mongoose)	1m 29s
Linting & Testing (datasource-sequelize)	40s
Linting & Testing (datasource-sql)	2m 22s
Linting & Testing (datasource-toolkit)	52s
Linting & Testing (forestadmin-client)	51s
Linting & Testing (plugin-aws-s3)	39s
Linting & Testing (plugin-export-advanced)	41s
Linting & Testing (plugin-flattener)	39s
Send Coverage	16s
Release packages	0s
Publish API Reference	0s
	16m 43s

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