Upgrade vulcanize to 0.7.6.

node_modules/vulcanize/node_modules/update-notifier/node_modules/semver-diff/node_modules/semver/test/index.js

Index: node_modules/vulcanize/node_modules/update-notifier/node_modules/semver-diff/node_modules/semver/test/index.js
diff --git a/node_modules/vulcanize/node_modules/update-notifier/node_modules/semver-diff/node_modules/semver/test/index.js b/node_modules/vulcanize/node_modules/update-notifier/node_modules/semver-diff/node_modules/semver/test/index.js
index de8acaedfb5fdc7ab6c22925b132b168815d2424..1528bb778850950318a9443d4fb2f31afb3d4733 100644
--- a/node_modules/vulcanize/node_modules/update-notifier/node_modules/semver-diff/node_modules/semver/test/index.js
+++ b/node_modules/vulcanize/node_modules/update-notifier/node_modules/semver-diff/node_modules/semver/test/index.js
@@ -13,6 +13,7 @@ var lte = semver.lte;
 var satisfies = semver.satisfies;
 var validRange = semver.validRange;
 var inc = semver.inc;
+var diff = semver.diff;
 var replaceStars = semver.replaceStars;
 var toComparators = semver.toComparators;
 var SemVer = semver.SemVer;
@@ -411,6 +412,34 @@ test('\nincrement versions test', function(t) {
   t.end();
 });
 
+test('\ndiff versions test', function(t) {
+//  [version1, version2, result]
+//  diff(version1, version2) -> result
+  [['1.2.3', '0.2.3', 'major'],
+    ['1.4.5', '0.2.3', 'major'],
+    ['1.2.3', '2.0.0-pre', 'premajor'],
+    ['1.2.3', '1.3.3', 'minor'],
+    ['1.0.1', '1.1.0-pre', 'preminor'],
+    ['1.2.3', '1.2.4', 'patch'],
+    ['1.2.3', '1.2.4-pre', 'prepatch'],
+    ['0.0.1', '0.0.1-pre', 'prerelease'],
+    ['0.0.1', '0.0.1-pre-2', 'prerelease'],
+    ['1.1.0', '1.1.0-pre', 'prerelease'],
+    ['1.1.0-pre-1', '1.1.0-pre-2', 'prerelease'],
+    ['1.0.0', '1.0.0', null]
+
+  ].forEach(function(v) {
+    var version1 = v[0];
+    var version2 = v[1];
+    var wanted = v[2];
+    var found = diff(version1, version2);
+    var cmd = 'diff(' + version1 + ', ' + version2 + ')';
+    t.equal(found, wanted, cmd + ' === ' + wanted);
+  });
+
+  t.end();
+});
+
 test('\nvalid range test', function(t) {
   // [range, result]
   // validRange(range) -> result