Increased all toJSON() versions for consistency.

src/core/BufferGeometry.js

@@ -881,7 +881,7 @@ Object.assign( BufferGeometry.prototype, EventDispatcher.prototype, {
 
 		var data = {
 			metadata: {
-				version: 4.4,
+				version: 4.5,
 				type: 'BufferGeometry',
 				generator: 'BufferGeometry.toJSON'
 			}

src/core/Geometry.js

@@ -965,7 +965,7 @@ Object.assign( Geometry.prototype, EventDispatcher.prototype, {
 
 		var data = {
 			metadata: {
-				version: 4.4,
+				version: 4.5,
 				type: 'Geometry',
 				generator: 'Geometry.toJSON'
 			}

src/materials/Material.js

@@ -131,7 +131,7 @@ Object.assign( Material.prototype, EventDispatcher.prototype, {
 
 		var data = {
 			metadata: {
-				version: 4.4,
+				version: 4.5,
 				type: 'Material',
 				generator: 'Material.toJSON'
 			}

src/textures/Texture.js

@@ -153,7 +153,7 @@ Object.assign( Texture.prototype, EventDispatcher.prototype, {
 
 		var output = {
 			metadata: {
-				version: 4.4,
+				version: 4.5,
 				type: 'Texture',
 				generator: 'Texture.toJSON'
 			},