style: branch available in options not root of config

test/specs/commits.js

@@ -7,7 +7,7 @@ const commits = proxyquire('../../dist/lib/commits', {
 
 test('commits since last release', (t) => {
   t.test('get all commits', (tt) => {
-    commits({lastRelease: {}, branch: 'master'}, (err, commits) => {
+    commits({lastRelease: {}, options: {branch: 'master'}}, (err, commits) => {
       tt.error(err)
       tt.is(commits.length, 2, 'all commits')
       tt.is(commits[0].hash, 'hash-one', 'parsed hash')
@@ -18,7 +18,7 @@ test('commits since last release', (t) => {
   })
 
   t.test('get commits since hash', (tt) => {
-    commits({lastRelease: {gitHead: 'hash'}, branch: 'master'}, (err, commits) => {
+    commits({lastRelease: {gitHead: 'hash'}, options: {branch: 'master'}}, (err, commits) => {
       tt.error(err)
       tt.is(commits.length, 1, 'specified commits')
       tt.is(commits[0].hash, 'hash-one', 'parsed hash')
@@ -29,7 +29,7 @@ test('commits since last release', (t) => {
   })
 
   t.test('get commits since hash', (tt) => {
-    commits({lastRelease: {gitHead: 'notinhistory'}, branch: 'notmaster'}, (err, commits) => {
+    commits({lastRelease: {gitHead: 'notinhistory'}, options: {branch: 'notmaster'}}, (err, commits) => {
       tt.ok(err)
       tt.is(err.code, 'ENOTINHISTORY')
       tt.end()

test/specs/pre.js

@@ -30,7 +30,7 @@ test('full pre run', (t) => {
     tt.plan(3)
 
     pre({
-      branch: 'master',
+      options: {branch: 'master'},
       npm,
       pkg: {name: 'available'},
       plugins
@@ -45,7 +45,7 @@ test('full pre run', (t) => {
     tt.plan(3)
 
     pre({
-      branch: 'master',
+      options: {branch: 'master'},
       npm,
       pkg: {name: 'unavailable'},
       plugins