fix: lint error

Author: Jack-Works

src/compiler/moduleNameResolver.ts

@@ -1084,11 +1084,12 @@ namespace ts {
                 trace(state.host, Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
             }
             return tryAddingExtensions(extensionless, extensions, onlyRecordFailures, state);
-        } else if (hasTSFileExtension(candidate)) {
+        }
+        else if (hasTSFileExtension(candidate)) {
             // If import './x.ts' or './x.tsx', resolve it
             // if import from '.d.ts', bypass it
             const ext = tryExtractTSExtension(candidate)!;
-            if (ext !== '.d.ts') {
+            if (ext !== Extension.Dts) {
                 const extensionLess = tryRemoveExtension(candidate, ext)!;
                 return tryAddingExtensions(extensionLess, extensions, onlyRecordFailures, state);
             }