ImageCoercion Req Set for Excel for Mac looks incorrect

[AlexJerabek]

Based on the nearby requirement set for TextCoercion, the Excel build specified seems way off:

{
	"name": "TextCoercion",
	"apiVersion": "1.1",
	"supportedProductVersions": [{
		"from": {
			"build": "15.13",
			"version": null
		}
	}],
	"availability": "GA"
},
{
	"name": "ImageCoercion",
	"apiVersion": "1.1",
	"supportedProductVersions": [{
		"from": {
			"build": "1.14",
			"version": null
		}
	}],
	"availability": "GA"
},