Fix tests to be non-global.

Author: DanielRosenwasser

tests/cases/compiler/circularlySimplifyingConditionalTypesNoCrash.ts

@@ -45,4 +45,6 @@ const myStoreConnect: Connect = function(
         mergeProps,
         options,
     );
-};
+};
+
+export {};

tests/cases/compiler/indexedAccessRetainsIndexSignature.ts

@@ -7,4 +7,4 @@ type Omit1<U, K extends keyof U> = Pick<U, Diff<keyof U, K>>;
 type Omit2<T, K extends keyof T> = {[P in Diff<keyof T, K>]: T[P]};
 
 type O = Omit<{ a: number, b: string }, 'a'>
-const o: O = { b: '' }
+export const o: O = { b: '' }

tests/cases/compiler/reactReduxLikeDeferredInferenceAllowsAssignment.ts

@@ -143,3 +143,5 @@ const Test1 = connect(
   null,
   mapDispatchToProps
 )(TestComponent);
+
+export {};