removed jwt-auth core plugin, other plugin updates

Notable issues:

• fix: remove jwt-auth plugin. use the auth plugin instead (#187) 7c790b1
• fix: upgrade @adobe/aio-cli-plugin-console from 3.0.1 to 3.0.2 (#184) f097fea
• fix: upgrade @adobe/aio-cli-plugin-app from 2.0.6 to 2.0.7, 2.0.8, 2.1.0 (#177) e197e7a
• fix: upgrade @adobe/aio-cli-plugin-auth from 2.1.0 to 2.1.1, 2.1.2 (#186) 6193312
• fix: add link to new docs in README (closes #185) 40e4dc1
• fix: remove getting started (#171) a3d13ff

Others:

• fix: eslint issues (#186) 6193312
• fix: use codecov bash uploader 7f45006
• fix: upgrade @oclif/plugin-plugins from 1.7.8 to 1.7.9 (#183) a4ac807
• fix: upgrade @oclif/plugin-help from 2.2.1 to 2.2.3 (#178) 49f37d2
• fix: upgrade @oclif/color from 0.1.0 to 0.1.2 (#179) 705f7fb
• fix: upgrade @oclif/plugin-not-found from 1.2.3 to 1.2.4 (#180) fff77e1
• fix: upgrade ora from 4.0.3 to 4.0.4 (#181) 859f5ac
• fix: upgrade cli-ux from 5.4.5 to 5.4.6 (#182) deb1a85
• fix: upgrade semver from 7.1.3 to 7.3.2 (#173) 1a6a93c
• fix: upgrade inquirer from 7.0.1 to 7.1.0 (#174) 9826495
• fix: upgrade @oclif/command from 1.5.19 to 1.6.1 (#175) 20e9157
• fix: upgrade @oclif/config from 1.13.3 to 1.15.1 (#176) 77e6ff5

3.4.1...3.5.0