Reduce http requests with one font file handling variations.
"fontFamilies": [
				{
					"fontFamily": "montserrat, sans-serif",
					"name": "Montserrat",
					"slug": "default",
					"fontFace": [
						{
							"fontFamily": "montserrat",
							"fontVariationSettings": "'wght' 400",
							"fontStyle": "normal",
							"fontWeight": "400",
							"src": ["file:./assets/fonts/Montserrat-VariableFont_wght.ttf"]
						},
						{
							"fontFamily": "montserrat",
							"fontVariationSettings": "'wght' 500",
							"fontStyle": "normal",
							"fontWeight": "500",
							"src": ["file:./assets/fonts/Montserrat-VariableFont_wght.ttf"]
						},
						{
							"fontFamily": "montserrat",
							"fontVariationSettings": "'wght' 600",
							"fontStyle": "normal",
							"fontWeight": "600",
							"src": ["file:./assets/fonts/Montserrat-VariableFont_wght.ttf"]
						},
						{
							"fontFamily": "montserrat",
							"fontVariationSettings": "'wght' 400",
							"fontStyle": "italic",
							"fontWeight": "400",
							"src": ["file:./assets/fonts/Montserrat-Italic-VariableFont_wght.ttf"]
						}
					]
				}
			]