Fix lint

src/three/B3DMLoader.js

@@ -41,7 +41,7 @@ export class B3DMLoader extends B3DMLoaderBase {
 
 			// GLTFLoader assumes the working path ends in a slash
 			let workingPath = this.workingPath;
-			if ( !/[\\/]$/.test( workingPath ) ) {
+			if ( ! /[\\/]$/.test( workingPath ) ) {
 
 				workingPath += '/';
 

src/three/I3DMLoader.js

@@ -58,7 +58,7 @@ export class I3DMLoader extends I3DMLoaderBase {
 
 					// GLTFLoader assumes the working path ends in a slash
 					let workingPath = this.workingPath;
-					if ( !/[\\/]$/.test( workingPath ) ) {
+					if ( ! /[\\/]$/.test( workingPath ) ) {
 
 						workingPath += '/';