Export missing Types for public API (#595)

* Export types in public API

Fixes #593

* Update api.test.ts

Author: tclindner

Diff for: src/api.ts

@@ -1 +1,11 @@
-export {NpmPackageJsonLint} from './npm-package-json-lint';
+export {NpmPackageJsonLint, NpmPackageJsonLintOptions} from './npm-package-json-lint';
+
+export {LintIssue} from './lint-issue';
+
+export {Severity} from './types/severity';
+
+export {LinterResult} from './linter/linter';
+
+export {PackageJsonFileLintingResult} from './types/package-json-linting-result';
+
+export {PackageJsonFileAggregatedResultCounts, OverallAggregatedResultCounts} from './linter/results-helper';

Diff for: test/unit/api.test.ts

@@ -6,4 +6,32 @@ describe('api Unit Tests', () => {
   test('NpmPackageJsonLint should be exported', () => {
     expect(api).toHaveProperty('NpmPackageJsonLint');
   });
+
+  test('NpmPackageJsonLintOptions should be exported', () => {
+    expect(api).not.toHaveProperty('NpmPackageJsonLintOptions');
+  });
+
+  test('LintIssue should be exported', () => {
+    expect(api).toHaveProperty('LintIssue');
+  });
+
+  test('Severity should be exported', () => {
+    expect(api).toHaveProperty('Severity');
+  });
+
+  test('LinterResult should be exported', () => {
+    expect(api).not.toHaveProperty('LinterResult');
+  });
+
+  test('PackageJsonFileLintingResult should be exported', () => {
+    expect(api).not.toHaveProperty('PackageJsonFileLintingResult');
+  });
+
+  test('PackageJsonFileAggregatedResultCounts should be exported', () => {
+    expect(api).not.toHaveProperty('PackageJsonFileAggregatedResultCounts');
+  });
+
+  test('OverallAggregatedResultCounts should be exported', () => {
+    expect(api).not.toHaveProperty('OverallAggregatedResultCounts');
+  });
 });