Update dependencies

Author: jonathantneal

package.json

@@ -41,20 +41,20 @@
   },
   "homepage": "https://github.com/postcss/gulp-postcss",
   "dependencies": {
-    "fancy-log": "^1.3.2",
+    "fancy-log": "^1.3.3",
     "plugin-error": "^1.0.1",
-    "postcss": "^7.0.2",
+    "postcss": "^7.0.14",
     "postcss-load-config": "^2.0.0",
     "vinyl-sourcemaps-apply": "^0.2.1"
   },
   "devDependencies": {
-    "coveralls": "^3.0.2",
-    "eslint": "^5.3.0",
-    "gulp-sourcemaps": "^2.6.0",
+    "coveralls": "^3.0.3",
+    "eslint": "^5.16.0",
+    "gulp-sourcemaps": "^2.6.5",
     "mocha": "^5.2.0",
     "nyc": "^12.0.2",
-    "proxyquire": "^2.0.1",
-    "sinon": "^6.1.4",
+    "proxyquire": "^2.1.0",
+    "sinon": "^6.3.5",
     "vinyl": "^2.2.0"
   }
 }

test.js

@@ -135,7 +135,7 @@ it('should generate source maps', function (cb) {
     .pipe(write)
 
   write.on('data', function (file) {
-    assert.equal(file.sourceMap.mappings, 'AAAA,IAAI,aAAY,CAAZ,aAAY,CAAZ,aAAY,CAAZ,YAAY,EAAE')
+    assert.equal(file.sourceMap.mappings, 'AAAA,IAAI,YAAW,EAAX,YAAW,EAAX,YAAW,EAAX,aAAa')
     assert(/sourceMappingURL=data:application\/json;(?:charset=\w+;)?base64/.test(file.contents.toString()))
     cb()
   })