Allowed falling back to json engine when accept header includes application/json

• Allowed falling back to json engine when accept header includes application/json

Updated dependencies and removed stale packages

• Updated dependencies
• Removed biggulp, updated node, added npm scripts

Updated dependencies and outdated packages

• Updated dependencies
• Removed biggulp, updated node, added npm scripts

When not using hal, still render empty arrays at the top-level for embedded resources

When not using hal, still render empty arrays at the top-level for embedded resources