refactor(commits,type): simplify interfaces

test/specs/type.js

@@ -6,14 +6,11 @@ test('get type from commits', (t) => {
   t.test('get type from plugin', (t) => {
     type({
       analyze: () => 'major'
-    }, {
-      commits: [{
-        hash: '0',
-        message: 'a'
-      }],
-      lastRelease: {
-        version: '1.0.0'
-      }
+    }, [{
+      hash: '0',
+      message: 'a'
+    }], {
+      version: '1.0.0'
     }, (err, type) => {
       t.error(err)
       t.is(type, 'major')
@@ -23,20 +20,17 @@ test('get type from commits', (t) => {
   t.test('error when no changes', (t) => {
     type({
       analyze: () => null
-    }, {
-      commits: [],
-      lastRelease: {}
-    }, (err) => {
+    }, [], {},
+    (err) => {
       t.is(err.code, 'ENOCHANGE')
     })
   })
 
   t.test('initial version', (t) => {
-    type({}, {
-      lastRelease: {
-        version: null
-      }
-    }, (err, type) => {
+    type({
+      analyze: () => 'major'
+    }, [], {},
+    (err, type) => {
       t.error(err)
       t.is(type, 'initial')
     })