Update tsconfig to be stricter. Add @swc/core devDep

packages/web3.js-plugin-fee-estimation/package.json

@@ -27,6 +27,7 @@
   },
   "devDependencies": {
     "@eth-optimism/contracts-ts": "workspace:^",
+    "@swc/core": "^1.3.74",
     "@vitest/coverage-istanbul": "^0.33.0",
     "tsup": "^7.1.0",
     "typescript": "^5.1.6",

packages/web3.js-plugin-fee-estimation/tsconfig.json

@@ -3,13 +3,30 @@
   "compilerOptions": {
     "outDir": "./dist",
     "baseUrl": "./src",
-    "strict": true,
-    "skipLibCheck": true,
-    "module": "ESNext",
-    "moduleResolution": "node",
-    "jsx": "react",
+    "noEmit": true,
     "target": "ESNext",
-    "noEmit": true
+		"lib": ["esnext"],
+		"module": "esnext",
+		"moduleResolution": "Node",
+		"isolatedModules": true,
+		"incremental": true,
+		"allowUnreachableCode": false,
+		"skipLibCheck": false,
+		"allowUnusedLabels": false,
+		"alwaysStrict": true,
+		"exactOptionalPropertyTypes": true,
+		"noFallthroughCasesInSwitch": true,
+		"noImplicitAny": true,
+		"noImplicitReturns": true,
+		"noImplicitOverride": true,
+		"noImplicitThis": true,
+		"forceConsistentCasingInFileNames": true,
+		"verbatimModuleSyntax": true,
+		"noPropertyAccessFromIndexSignature": true,
+		"noUncheckedIndexedAccess": true,
+		"noUnusedLocals": true,
+		"noUnusedParameters": true,
+		"strict": true
   },
   "include": ["./src"]
 }