fix(core): prevent duplicating facet values (#705)

* fix(core): prevent duplicating facet values

fixes #663

Confirmed this in: https://codesandbox.io/s/check-extra-request-higuj (you need to clone it, CodeSandbox doesn't deduplicate the dependency as expected)

* chore: update size

package.json

@@ -46,7 +46,7 @@
   },
   "dependencies": {
     "algoliasearch-helper": "^2.26.1",
-    "instantsearch.js": "^3.5.4"
+    "instantsearch.js": "^3.6.0"
   },
   "peerDependencies": {
     "algoliasearch": "^3.30.0",
@@ -101,7 +101,7 @@
   "bundlesize": [
     {
       "path": "./dist/vue-instantsearch.js",
-      "maxSize": "60 kB"
+      "maxSize": "60.50 kB"
     },
     {
       "path": "./dist/vue-instantsearch.esm.js",

yarn.lock

@@ -5913,10 +5913,10 @@ instantsearch.css@7.3.1:
   resolved "https://registry.yarnpkg.com/instantsearch.css/-/instantsearch.css-7.3.1.tgz#7ab74a8f355091ae040947a9cf5438f379026622"
   integrity sha512-/kaMDna5D+Q9mImNBHEhb9HgHATDOFKYii7N1Iwvrj+lmD9gBJLqVhUw67gftq2O0QI330pFza+CRscIwB1wQQ==
 
-instantsearch.js@^3.5.4:
-  version "3.5.4"
-  resolved "https://registry.yarnpkg.com/instantsearch.js/-/instantsearch.js-3.5.4.tgz#59f8e07313300448771b1f8ff92f15e75f2130e5"
-  integrity sha512-hvBzKPwbk/jde1xS3vEQJfhYBq2NWuWxhzr3P3p/ZX5Lf5XIUjWalNX3oHqEW2iYisMdcxWbVkZxpvL/ACHzNw==
+instantsearch.js@^3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/instantsearch.js/-/instantsearch.js-3.6.0.tgz#388695b2a238b22a19adfff15bdcd1a767458a22"
+  integrity sha512-Ka7jkYYaZadlinf4R6CfuH24iAFqflJT1GKCLEzs4gni0yPf0YKysKjv32B8O3iie3PHB72bYPne0goZ38XCpg==
   dependencies:
     algoliasearch-helper "^2.26.0"
     classnames "^2.2.5"