Use "this" in static methods

xsuite/src/world/fsworld.ts

@@ -81,7 +81,7 @@ export class FSWorld extends World {
     explorerUrl?: string;
   } & ProxyParams = {}): Promise<FSWorld> {
     const { server, proxyUrl } = await startProxy(proxyParams);
-    return FSWorld.new({ proxyUrl, gasPrice, explorerUrl, server });
+    return this.new({ proxyUrl, gasPrice, explorerUrl, server });
   }
 
   async restartProxy(proxyParams: ProxyParams = {}) {

xsuite/src/world/lsworld.ts

@@ -107,7 +107,7 @@ export class LSWorld extends World {
       });
     });
 
-    return LSWorld.new({ proxyUrl, gasPrice, explorerUrl, server });
+    return this.new({ proxyUrl, gasPrice, explorerUrl, server });
   }
 
   newWallet(addressOrSigner: AddressLike | Signer): LSWallet {

xsuite/src/world/world.ts

@@ -83,15 +83,15 @@ export class World {
   }
 
   static newDevnet(options: WorldNewRealnetOptions = {}) {
-    return World.new({ chainId: devnetChainId, ...options });
+    return this.new({ chainId: devnetChainId, ...options });
   }
 
   static newTestnet(options: WorldNewRealnetOptions = {}) {
-    return World.new({ chainId: testnetChainId, ...options });
+    return this.new({ chainId: testnetChainId, ...options });
   }
 
   static newMainnet(options: WorldNewRealnetOptions = {}) {
-    return World.new({ chainId: mainnetChainId, ...options });
+    return this.new({ chainId: mainnetChainId, ...options });
   }
 
   newWallet(signer: Signer) {