style: fix issues with latest linter rules

Author: alvis

source/client.ts

@@ -106,8 +106,10 @@ export class Notion {
     this.client = got.extend({
       prefixUrl: 'https://api.notion.com/v1',
       headers: {
+        /* eslint-disable @typescript-eslint/naming-convention */
         'authorization': `Bearer ${token}`,
         'notion-version': version,
+        /* eslint-enable @typescript-eslint/naming-convention */
       },
       responseType: 'json',
     });

source/node.ts

@@ -85,7 +85,9 @@ export class NodeManager {
   public async update(entities: FullEntity[]): Promise<void> {
     // get entries with relationship build-in
     const old = new Map<string, NodeInput>(
-      (await this.cache.get('nodeGraph')) ?? [],
+      ((await this.cache.get('nodeGraph')) as
+        | Array<[string, NodeInput]>
+        | undefined) ?? [],
     );
     const current = this.computeNodeGraph(entities);
     const { added, updated, removed, unchanged } = computeChanges(old, current);