Rename Spine to ReadingOrder (internal data model property name)

[danielweck]

r2-shared-js/src/models/publication.ts

Line 44 in 44ebead

public Spine!: Link[];

[danielweck]

Note the backward-compatibility spine vs. readingOrder JSON (de)serialization:

r2-shared-js/src/models/publication.ts

Lines 53 to 67 in 9de704b

	@JsonProperty("readingOrder")
	@JsonElementType(Link)
	public Spine2!: Link[];
	@JsonProperty("spine")
	@JsonElementType(Link)
	public Spine1!: Link[] | undefined;
	get Spine(): Link[] | undefined {
	return this.Spine2 ? this.Spine2 : this.Spine1;
	}
	set Spine(spine: Link[] | undefined) {
	if (spine) {
	this.Spine1 = undefined;
	this.Spine2 = spine;
	}
	}