v2.60.0

Merged

• feat(env): add command to list/get/set/import environment variables #1162
• fix(deps): update netlify packages #1192
• docs(fix): hide hidden command flags from docs #1190
• test: set random static server port for tests #1188
• fix(deps): update dependency random-item to v3 #1173
• ci: change limit to 30 minutes #1187
• fix(deps): update dependency read-pkg-up to v7 #1176
• ci: update node versions to 8,12,14 #1185
• chore(deps): ignore some more packages due to node 8 support #1184