v10.0.0

Update to new major versions of hapi dependencies.

Summary of relevant changes

@hapi/joi v16

• Changes in allow() and valid()
  No longer accepts array arguments. Must pass each value as a separate argument.
  See hapijs/joi#2037
• Change error in sync validate() result to undefined instead of null when there is no error
  See hapijs/joi#2036
  See hapijs/joi#2037

@hapi/hapi v19

• No joi schema compiler is loaded by default and must be explicitly loaded using server.validator()
  See hapijs/hapi#4017
  See https://hapi.dev/api/?v=19.1.0#-servervalidatorvalidator

@hapi/boom v8

• Change new Boom() to new Boom.Boom()
  See hapijs/boom#253