refactor(core): Remove linting exceptions in nodes-base (#4794)

* ⚡ enabled array-type

* ⚡ await-thenable on

* ⚡ ban-types on

* ⚡ default-param-last on

* ⚡ dot-notation on

* ⚡ member-delimiter-style on

* ⚡ no-duplicate-imports on

* ⚡ no-empty-interface on

* ⚡ no-floating-promises on

* ⚡ no-for-in-array on

* ⚡ no-invalid-void-type on

* ⚡ no-loop-func on

* ⚡ no-shadow on

* ⚡ ban-ts-comment re enabled

* ⚡ @typescript-eslint/lines-between-class-members on

* address my own comment

* @typescript-eslint/return-await on

* @typescript-eslint/promise-function-async on

* @typescript-eslint/no-unnecessary-boolean-literal-compare on

* @typescript-eslint/no-unnecessary-type-assertion on

* prefer-const on

* @typescript-eslint/prefer-optional-chain on

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/nodes-base/nodes/Google/Books/GenericFunctions.ts

@@ -97,7 +97,7 @@ export async function googleApiRequestAllItems(
 	return returnData;
 }
 
-function getAccessToken(
+async function getAccessToken(
 	this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions,
 	credentials: IGoogleAuthCredentials,
 ): Promise<IDataObject> {
@@ -108,22 +108,22 @@ function getAccessToken(
 	const now = moment().unix();
 
 	credentials.email = credentials.email.trim();
-	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n').trim();
+	const privateKey = credentials.privateKey.replace(/\\n/g, '\n').trim();
 
 	const signature = jwt.sign(
 		{
-			iss: credentials.email as string,
-			sub: credentials.delegatedEmail || (credentials.email as string),
+			iss: credentials.email,
+			sub: credentials.delegatedEmail || credentials.email,
 			scope: scopes.join(' '),
 			aud: `https://oauth2.googleapis.com/token`,
 			iat: now,
 			exp: now + 3600,
 		},
-		privateKey as string,
+		privateKey,
 		{
 			algorithm: 'RS256',
 			header: {
-				kid: privateKey as string,
+				kid: privateKey,
 				typ: 'JWT',
 				alg: 'RS256',
 			},
@@ -143,6 +143,5 @@ function getAccessToken(
 		json: true,
 	};
 
-	//@ts-ignore
-	return this.helpers.request(options);
+	return this.helpers.request!(options);
 }