Lint: fix errors about redundant optional default values

Author: larabr

lib/crypto/argon2.ts

@@ -9,7 +9,7 @@ export interface Argon2Options {
     password: string,
     salt: Uint8Array<ArrayBuffer>,
     /** see https://www.rfc-editor.org/rfc/rfc9106.html#name-parameter-choice */
-    params: Argon2Params
+    params?: Argon2Params
 }
 
 // We manually reload the module if no memory-heavy (128MB+) argon2 computation has been requested in a while,

lib/message/processMIME.ts

@@ -41,8 +41,10 @@ const verifySignature = async (
     if (parts.length < 3) {
         return { subdata: data, verificationStatus: VERIFICATION_STATUS.NOT_SIGNED, signatures: [] };
     }
-    const { attachments: [sigAttachment] = [] } = await parseMail(parts[2].trim());
-    const { contentType: sigAttachmentContentType = '', content: sigAttachmentContent = new Uint8Array() } = sigAttachment ?? {};
+    const { attachments: [sigAttachment] } = await parseMail(parts[2].trim());
+    const { contentType: sigAttachmentContentType = '', content: sigAttachmentContent = new Uint8Array() } = (
+        sigAttachment as Attachment | undefined /** explicit typing needed due to TS inference limitation with array destructuring */
+    ) ?? {};
     if (sigAttachmentContentType.toLowerCase() !== 'application/pgp-signature') {
         return { subdata: data, verificationStatus: VERIFICATION_STATUS.NOT_SIGNED, signatures: [] };
     }
@@ -93,7 +95,7 @@ const parse = async (
     signatures: OpenPGPSignature[] = []
 ): Promise<ProcessMIMEResult> => {
     // cf. https://github.com/autocrypt/memoryhole subject can be in the MIME headers
-    const { attachments: parsedAttachments = [], body: { text = '', html = '' }, subject: mimeSubject = '' } = await parseMail(mailContent);
+    const { attachments: parsedAttachments, body: { text, html }, subject: mimeSubject = '' } = await parseMail(mailContent);
 
     // normalise attachments and look for encrypted subject
     let encryptedSubjectHeader;