message: Add debug setting to `Orbit` global
  `Orbit.debug` is `true` by default to improve awareness of deprecations and other debugging safeguards.
diff: @@ -10,6 +10,7 @@ export interface OrbitGlobal {
  assert: (description: string, test: boolean) => void | never;
  deprecate: (message: string, test?: boolean | (() => boolean)) => void;
  uuid: () => string;
  + debug: boolean;
  }
  // Establish the root object, `window` (`self`) in the browser, `global`
  @@ -29,6 +30,7 @@ const globals =
  export const Orbit: OrbitGlobal = {
  globals,
  assert,
  + debug: true,
  deprecate,
  uuid
  };
  