upgrade eslint and fix breaking changes

src/version/delete-version.ts

@@ -1,3 +1,4 @@
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 import {from, Observable, merge, throwError, of} from 'rxjs'
 import {catchError, map, tap} from 'rxjs/operators'
 import {graphql} from './graphql'

src/version/get-versions.ts

@@ -1,4 +1,6 @@
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 import {GraphQlQueryResponse} from '@octokit/graphql/dist-types/types'
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 import {Observable, from, throwError} from 'rxjs'
 import {catchError, map} from 'rxjs/operators'
 import {graphql} from './graphql'
@@ -107,7 +109,7 @@ export function queryForOldestVersions(
         }
       }) as Promise<GetVersionsQueryResponse>
     ).pipe(
-      catchError((err: GraphQlQueryResponse) => {
+      catchError((err: GraphQlQueryResponse<unknown>) => {
         const msg = 'query for oldest version failed.'
         return throwError(
           err.errors && err.errors.length > 0
@@ -129,7 +131,7 @@ export function queryForOldestVersions(
         }
       }) as Promise<GetVersionsQueryResponse>
     ).pipe(
-      catchError((err: GraphQlQueryResponse) => {
+      catchError((err: GraphQlQueryResponse<unknown>) => {
         const msg = 'query for oldest version failed.'
         return throwError(
           err.errors && err.errors.length > 0
@@ -164,7 +166,7 @@ export function getOldestVersions(
           `package: ${packageName} not found for owner: ${owner} in repo: ${repo}`
         )
         r = {
-          versions: <VersionInfo[]>[],
+          versions: [] as VersionInfo[],
           cursor: '',
           paginate: false,
           totalCount: 0

src/version/graphql.ts

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-unused-vars */
 import {GitHub} from '@actions/github'
 import {GraphQlQueryResponseData} from '@octokit/graphql/dist-types/types'
 import {RequestParameters} from '@octokit/types/dist-types/RequestParameters'