fix(toml): integration test file, add check test

test/pass/toml.md

@@ -1,7 +1,7 @@
 +++
 title = "Includes TOML support"
 description = "Curabitur id vulputate ex. Donec ac faucibus quam, lobortis volutpat tellus. Pellentesque habitant morbi tristique senectus et netus et malesuada non."
-slug: "toml"
+slug = "toml"
 +++
 
 Hello Toml

test/seocheck.test.js

@@ -23,11 +23,24 @@ slug: much-too-long-indeed
 
 content`
 
+const toml = `+++
+title = "hello"
+description = "world"
+slug = "hello"
++++
+
+content`
+
 test('check() should validate seo requirements', () => {
   const actual = check({ name: 'test.md', content: validMd })
   expect(actual).toEqual({ file: 'test.md', ok: true })
 })
 
+test('check() work with TOML', () => {
+  const actual = check({ name: 'toml.md', content: toml })
+  expect(actual).toEqual({ file: 'toml.md', ok: true })
+})
+
 test('check() should error on missing seo requirements', () => {
   const actual = check({ name: 'test.md', content: errMd })
   expect(actual).toEqual({