Update eslint from 8.x to 9.x (#185)

* remove eslint prettier plugins

Signed-off-by: Brian DeHamer <bdehamer@github.com>

* eslint upgrade

Signed-off-by: Brian DeHamer <bdehamer@github.com>

* source fixup

Signed-off-by: Brian DeHamer <bdehamer@github.com>

---------

Signed-off-by: Brian DeHamer <bdehamer@github.com>

__tests__/index.test.ts

@@ -13,7 +13,7 @@ describe('index', () => {
   beforeEach(() => {
     getBooleanInputMock.mockImplementation(() => false)
   })
-  it('calls run when imported', async () => {
+  it('calls run when imported', () => {
     // eslint-disable-next-line @typescript-eslint/no-require-imports
     require('../src/index')
 

__tests__/subject.test.ts

@@ -232,7 +232,6 @@ describe('subjectFromInputs', () => {
         expect(subjects).toBeDefined()
         expect(subjects).toHaveLength(3)
 
-        /* eslint-disable-next-line github/array-foreach */
         subjects.forEach((subject, i) => {
           expect(subject.name).toEqual(`${filename}-${i}`)
           expect(subject.digest).toEqual({ sha256: expectedDigest })