fix(deps): update dependency apollo-link to v1.2.1

Author: renovate-bot

package.json

@@ -13,7 +13,7 @@
     "test": "echo No tests yet"
   },
   "dependencies": {
-    "apollo-link": "1.2.0",
+    "apollo-link": "1.2.1",
     "apollo-link-http": "1.3.3",
     "cross-fetch": "1.1.1",
     "graphql": "0.13.1",

yarn.lock

@@ -20,14 +20,13 @@ apollo-link-http@1.3.3:
   dependencies:
     apollo-link "^1.1.0"
 
-apollo-link@1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/apollo-link/-/apollo-link-1.2.0.tgz#1abba5456eb35fc8b8a79f3be421e683a9ecfc41"
+apollo-link@1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/apollo-link/-/apollo-link-1.2.1.tgz#c120b16059f9bd93401b9f72b94d2f80f3f305d2"
   dependencies:
     "@types/node" "^9.4.6"
-    "@types/zen-observable" "0.5.3"
     apollo-utilities "^1.0.0"
-    zen-observable "^0.8.0"
+    zen-observable-ts "^0.8.6"
 
 apollo-link@^1.1.0:
   version "1.1.0"
@@ -120,10 +119,16 @@ whatwg-fetch@2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-2.0.3.tgz#9c84ec2dcf68187ff00bc64e1274b442176e1c84"
 
+zen-observable-ts@^0.8.6:
+  version "0.8.6"
+  resolved "https://registry.yarnpkg.com/zen-observable-ts/-/zen-observable-ts-0.8.6.tgz#2fe8c5f5f6171484353c3c93a71355c9521d53a0"
+  dependencies:
+    zen-observable "^0.8.6"
+
 zen-observable@^0.7.0:
   version "0.7.1"
   resolved "https://registry.yarnpkg.com/zen-observable/-/zen-observable-0.7.1.tgz#f84075c0ee085594d3566e1d6454207f126411b3"
 
-zen-observable@^0.8.0:
+zen-observable@^0.8.6:
   version "0.8.6"
   resolved "https://registry.yarnpkg.com/zen-observable/-/zen-observable-0.8.6.tgz#e2419311497019419d7bb56d8f6a56356a607272"