Add packages to yarn without ^ prefix (fixes #1587) (#1589)

.yarnrc

@@ -0,0 +1,6 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+lastUpdateCheck 1484071239974
+save-prefix ""

package.json

@@ -159,7 +159,7 @@
     "better-npm-run": "0.0.13",
     "bunyan": "1.8.5",
     "classnames": "2.2.5",
-    "common-tags": "^1.4.0",
+    "common-tags": "1.4.0",
     "config": "1.24.0",
     "deep-eql": "2.0.1",
     "dompurify": "0.8.4",
@@ -181,7 +181,7 @@
     "react-dom": "15.4.1",
     "react-helmet": "3.3.0",
     "react-onclickoutside": "5.8.3",
-    "react-photoswipe": "^1.2.0",
+    "react-photoswipe": "1.2.0",
     "react-redux": "4.4.6",
     "react-router": "2.8.1",
     "react-router-scroll": "0.4.1",

yarn.lock

@@ -1410,7 +1410,7 @@ commander@2.9.0, commander@^2.9.0:
   dependencies:
     graceful-readlink ">= 1.0.0"
 
-common-tags@^1.4.0:
+common-tags@1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/common-tags/-/common-tags-1.4.0.tgz#1187be4f3d4cf0c0427d43f74eef1f73501614c0"
   dependencies:
@@ -3029,7 +3029,7 @@ https-browserify@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/https-browserify/-/https-browserify-0.0.1.tgz#3f91365cabe60b77ed0ebba24b454e3e09d95a82"
 
-humps@^2.0.0:
+humps@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/humps/-/humps-2.0.0.tgz#dd4a423e9784626fe7b9f19fde0baff659b40173"
 
@@ -4991,7 +4991,7 @@ react-onclickoutside@5.8.3:
   dependencies:
     object-assign "^4.0.1"
 
-react-photoswipe@^1.2.0:
+react-photoswipe@1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/react-photoswipe/-/react-photoswipe-1.2.0.tgz#e296e1150ed153bb2ddbc7222165291c13fe4e8c"
   dependencies: