add focal to travis, and debian stretch / buster to Github action to catch errors like Error:SSL routines:SSL_CTX_use_certificate:ee key too small

[MaxPeal]

to catch bugs like Error:SSL routines:SSL_CTX_use_certificate:ee key too small

https://wiki.debian.org/ContinuousIntegration/TriagingTips/openssl-1.1.1

[coveralls]

Coverage remained the same at 100.0% when pulling d651a62190810e2e1681e35c8f7dd1b9bd6af5ac on MaxPeal:patch-1 into a0309e6c475036b4ba2a04372f8d5b6462bd4825 on Rob--W:master.

[Rob--W]

What errors did you catch by enabling this option? The tests are supposedly independent of the underlying TLS library.

[MaxPeal]

please see the error of the github action, the tests are not independent of the underlying TLS library. on debian stretch its tests ok, https://github.com/MaxPeal/cors-anywhere/runs/1099395503?check_suite_focus=true https://github.com/MaxPeal/cors-anywhere/actions?query=workflow%3ADocker-Image-CI-stretch

on debian buster it FAIL https://github.com/MaxPeal/cors-anywhere/actions/runs/248959691 https://github.com/MaxPeal/cors-anywhere/actions?query=workflow%3ADocker-Image-CI-buster

my PR with out github action dont work, PR for RfC #273

[MaxPeal]

the ERROR MSG: 100 passing (5s) 2 failing

1. server on https "before all" hook: Error: error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small at Object.createSecureContext (_tls_common.js:129:17) at Server.setSecureContext (_tls_wrap.js:1323:27) at Server (_tls_wrap.js:1181:8) at new Server (https.js:66:14) at Object.createServer (https.js:90:10) at createServer (lib/cors-anywhere.js:417:31) at Context. (test/test.js:500:21) at processImmediate (internal/timers.js:461:21)

2. server on https "after all" hook: TypeError: Cannot read property 'close' of null at stopServer (test/test.js:35:17) at Context. (test/test.js:517:5) at processImmediate (internal/timers.js:461:21)

npm ERR! code ELIFECYCLE npm ERR! errno 2 npm ERR! [email protected] test: mocha ./test/test*.js --reporter spec npm ERR! Exit status 2 npm ERR!