[no-inferred-empty-object-type] Skip test in TS > 3.4.x (palantir#4661)

As the generic parameters are inferred as `unknown` in newer TS versions (> 3.4.x), this rule no longer applies in those versions, and those places that would have previously thrown an error, as seen in the tests, no longer should throw as they are no longer inferred as `{}`.

Author: ericbf

src/rules/noInferredEmptyObjectTypeRule.ts

@@ -30,8 +30,9 @@ export class Rule extends Lint.Rules.TypedRule {
         options: null,
         optionExamples: [true],
         rationale: Lint.Utils.dedent`
-            When function or constructor may be called with a type parameter but one isn't supplied or inferrable,
-            TypeScript defaults to \`{}\`.
+            Prior to TypeScript 3.4, generic type parameters for functions and constructors are inferred as
+            \`{}\` (the empty object type) by default when no type parameter is explicitly supplied or when
+            the compiler cannot infer a more specific type.
             This is often undesirable as the call is meant to be of a more specific type.
         `,
         type: "functionality",

test/rules/no-inferred-empty-object-type/test.ts.lint

@@ -1,3 +1,4 @@
+[typescript]: <=3.4.x
 let s: string;
 let n: number;
 let o: Object;