Fix verbatimModuleSyntax errors

tests/ember-truth-helpers/and-test.ts

@@ -2,7 +2,7 @@ import AndHelper from 'ember-truth-helpers/helpers/and';
 
 import { expectTypeOf } from 'expect-type';
 
-import { ReturnOf } from '../util';
+import type { ReturnOf } from '../util';
 
 // string could be an empty string and get returned, otherwse we get null
 declare const return1: ReturnOf<AndHelper<string, null, undefined, number | null>>;

tests/ember-truth-helpers/eq-test.ts

@@ -2,7 +2,7 @@ import EqHelper from 'ember-truth-helpers/helpers/eq';
 
 import { expectTypeOf } from 'expect-type';
 
-import { ReturnOf } from '../util';
+import type { ReturnOf } from '../util';
 
 declare const ret: ReturnOf<EqHelper>;
 expectTypeOf(ret).toBeBoolean();

tests/ember-truth-helpers/or-test.ts

@@ -2,7 +2,7 @@ import OrHelper from 'ember-truth-helpers/helpers/or';
 
 import { expectTypeOf } from 'expect-type';
 
-import { ReturnOf } from '../util';
+import type { ReturnOf } from '../util';
 
 // if number is 0, we'll eventually end up on string, it may be empty but we'll get it either way
 declare const return1: ReturnOf<OrHelper<number | null, undefined, null, string>>;

tests/util.ts

@@ -1,3 +1,3 @@
-import Helper, { ExpandSignature } from '@ember/component/helper';
+import Helper, { type ExpandSignature } from '@ember/component/helper';
 
 export type ReturnOf<T> = T extends Helper<infer S> ? ExpandSignature<S>['Return'] : never;

utils/types.ts

@@ -1,5 +1,5 @@
 import { htmlSafe } from '@ember/template';
-import { ExpandSignature } from '@glimmer/component/-private/component';
+import type { ExpandSignature } from '@glimmer/component/-private/component';
 
 // WARNING: This is not guaranteed to maintain argument position if more than one args name is passed!
 export type SignatureWithPositionedArg<S, K extends keyof ExpandSignature<S>['Args']['Named']> = {