Add dependency on react-router^3.2.1

Summary:
We’re switching from RRv4 to RRv3. We’ll remove RRv4, which is currently
unused, in the next commit.

wchargin-branch: add-rrv3

package.json

@@ -50,6 +50,7 @@
     "react": "^16.2.0",
     "react-dev-utils": "^5.0.0",
     "react-dom": "^16.2.0",
+    "react-router": "3.2.1",
     "react-router-dom": "^4.2.2",
     "style-loader": "0.19.0",
     "sw-precache-webpack-plugin": "0.11.4",

yarn.lock

@@ -1694,6 +1694,14 @@ create-hmac@^1.1.0, create-hmac@^1.1.2, create-hmac@^1.1.4:
     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
+create-react-class@^15.5.1:
+  version "15.6.3"
+  resolved "https://registry.yarnpkg.com/create-react-class/-/create-react-class-15.6.3.tgz#2d73237fb3f970ae6ebe011a9e66f46dbca80036"
+  dependencies:
+    fbjs "^0.8.9"
+    loose-envify "^1.3.1"
+    object-assign "^4.1.1"
+
 cross-spawn@5.1.0, cross-spawn@^5.0.1, cross-spawn@^5.1.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
@@ -2717,6 +2725,18 @@ fbjs@^0.8.16:
     setimmediate "^1.0.5"
     ua-parser-js "^0.7.9"
 
+fbjs@^0.8.9:
+  version "0.8.17"
+  resolved "https://registry.yarnpkg.com/fbjs/-/fbjs-0.8.17.tgz#c4d598ead6949112653d6588b01a5cdcd9f90fdd"
+  dependencies:
+    core-js "^1.0.0"
+    isomorphic-fetch "^2.1.1"
+    loose-envify "^1.0.0"
+    object-assign "^4.1.0"
+    promise "^7.1.1"
+    setimmediate "^1.0.5"
+    ua-parser-js "^0.7.18"
+
 figures@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/figures/-/figures-2.0.0.tgz#3ab1a2d2a62c8bfb431a0c94cb797a2fce27c962"
@@ -3188,6 +3208,15 @@ he@1.1.x:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/he/-/he-1.1.1.tgz#93410fd21b009735151f8868c2f271f3427e23fd"
 
+history@^3.0.0:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/history/-/history-3.3.0.tgz#fcedcce8f12975371545d735461033579a6dae9c"
+  dependencies:
+    invariant "^2.2.1"
+    loose-envify "^1.2.0"
+    query-string "^4.2.2"
+    warning "^3.0.0"
+
 history@^4.7.2:
   version "4.7.2"
   resolved "https://registry.yarnpkg.com/history/-/history-4.7.2.tgz#22b5c7f31633c5b8021c7f4a8a954ac139ee8d5b"
@@ -3218,6 +3247,10 @@ hoist-non-react-statics@^2.3.0:
   version "2.5.0"
   resolved "https://registry.yarnpkg.com/hoist-non-react-statics/-/hoist-non-react-statics-2.5.0.tgz#d2ca2dfc19c5a91c5a6615ce8e564ef0347e2a40"
 
+hoist-non-react-statics@^2.3.1:
+  version "2.5.5"
+  resolved "https://registry.yarnpkg.com/hoist-non-react-statics/-/hoist-non-react-statics-2.5.5.tgz#c5903cf409c0dfd908f388e619d86b9c1174cb47"
+
 home-or-tmp@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/home-or-tmp/-/home-or-tmp-2.0.0.tgz#e36c3f2d2cae7d746a857e38d18d5f32a7882db8"
@@ -5426,6 +5459,13 @@ prop-types@^15.5.4:
     loose-envify "^1.3.1"
     object-assign "^4.1.1"
 
+prop-types@^15.5.6:
+  version "15.6.2"
+  resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.6.2.tgz#05d5ca77b4453e985d60fc7ff8c859094a497102"
+  dependencies:
+    loose-envify "^1.3.1"
+    object-assign "^4.1.1"
+
 proxy-addr@~2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.2.tgz#6571504f47bb988ec8180253f85dd7e14952bdec"
@@ -5478,7 +5518,7 @@ qs@~6.4.0:
   version "6.4.0"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.4.0.tgz#13e26d28ad6b0ffaa91312cd3bf708ed351e7233"
 
-query-string@^4.1.0:
+query-string@^4.1.0, query-string@^4.2.2:
   version "4.3.4"
   resolved "https://registry.yarnpkg.com/query-string/-/query-string-4.3.4.tgz#bbb693b9ca915c232515b228b1a02b609043dbeb"
   dependencies:
@@ -5616,6 +5656,18 @@ react-router-dom@^4.2.2:
     react-router "^4.2.0"
     warning "^3.0.0"
 
+react-router@3.2.1:
+  version "3.2.1"
+  resolved "https://registry.yarnpkg.com/react-router/-/react-router-3.2.1.tgz#b9a3279962bdfbe684c8bd0482b81ef288f0f244"
+  dependencies:
+    create-react-class "^15.5.1"
+    history "^3.0.0"
+    hoist-non-react-statics "^2.3.1"
+    invariant "^2.2.1"
+    loose-envify "^1.2.0"
+    prop-types "^15.5.6"
+    warning "^3.0.0"
+
 react-router@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/react-router/-/react-router-4.2.0.tgz#61f7b3e3770daeb24062dae3eedef1b054155986"
@@ -6638,6 +6690,10 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
+ua-parser-js@^0.7.18:
+  version "0.7.18"
+  resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.18.tgz#a7bfd92f56edfb117083b69e31d2aa8882d4b1ed"
+
 ua-parser-js@^0.7.9:
   version "0.7.17"
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.17.tgz#e9ec5f9498b9ec910e7ae3ac626a805c4d09ecac"