From cdc73186c1b633615a6bea33e385a15a22bc6725 Mon Sep 17 00:00:00 2001
From: Evan Siroky <evan.siroky@yahoo.com>
Date: Thu, 25 Jul 2019 20:59:13 -0700
Subject: [PATCH] fix(build): downgrade to core-js 2

---
 lib/babel-config.js |  2 +-
 package.json        |  4 ++--
 yarn.lock           | 17 +++++++++++------
 3 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/lib/babel-config.js b/lib/babel-config.js
index f41355b..035700d 100644
--- a/lib/babel-config.js
+++ b/lib/babel-config.js
@@ -34,7 +34,7 @@ module.exports = function (env, instrument) {
           // us having to include this import in each project (which is what
           // `entry` does).
           useBuiltIns: 'usage',
-          corejs: 3
+          corejs: 2
         }
       ],
       flow,
diff --git a/package.json b/package.json
index ca13156..b5c5389 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "@babel/preset-env": "^7.5.5",
     "@babel/preset-flow": "^7.0.0",
     "@babel/preset-react": "^7.0.0",
-    "@babel/runtime-corejs3": "^7.5.5",
+    "@babel/runtime-corejs2": "^7.5.5",
     "aws-sdk": "^2.414.0",
     "babel-eslint": "^10.0.1",
     "babel-jest": "^24.1.0",
@@ -68,7 +68,7 @@
     "commander": "^2.19.0",
     "commitizen": "^3.0.7",
     "concat-stream": "^2.0.0",
-    "core-js": "3",
+    "core-js": "2",
     "cssnano": "^4.1.10",
     "cz-conventional-changelog": "^2.1.0",
     "envify": "^4.1.0",
diff --git a/yarn.lock b/yarn.lock
index 5790e16..754eb17 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -787,12 +787,12 @@
     "@babel/plugin-transform-react-jsx-self" "^7.0.0"
     "@babel/plugin-transform-react-jsx-source" "^7.0.0"
 
-"@babel/runtime-corejs3@^7.5.5":
+"@babel/runtime-corejs2@^7.5.5":
   version "7.5.5"
-  resolved "https://registry.yarnpkg.com/@babel/runtime-corejs3/-/runtime-corejs3-7.5.5.tgz#9744c03bdbef3091d277345bdd7131a29e67c957"
-  integrity sha512-bNxHJ+w7RfLzZJtIZdEjFgL1twwZ6ozuOmsEjtyuTqfi1hb1fqsDYYyi3Fi3i+RgAO4S9+wkSG102+GCqdpr7w==
+  resolved "https://registry.yarnpkg.com/@babel/runtime-corejs2/-/runtime-corejs2-7.5.5.tgz#c3214c08ef20341af4187f1c9fbdc357fbec96b2"
+  integrity sha512-FYATQVR00NSNi7mUfpPDp7E8RYMXDuO8gaix7u/w3GekfUinKgX1AcTxs7SoiEmoEW9mbpjrwqWSW6zCmw5h8A==
   dependencies:
-    core-js-pure "^3.0.0"
+    core-js "^2.6.5"
     regenerator-runtime "^0.13.2"
 
 "@babel/template@^7.0.0", "@babel/template@^7.1.0", "@babel/template@^7.1.2", "@babel/template@^7.2.2":
@@ -2672,12 +2672,17 @@ core-js-compat@^3.1.1:
     core-js-pure "3.1.4"
     semver "^6.1.1"
 
-core-js-pure@3.1.4, core-js-pure@^3.0.0:
+core-js-pure@3.1.4:
   version "3.1.4"
   resolved "https://registry.yarnpkg.com/core-js-pure/-/core-js-pure-3.1.4.tgz#5fa17dc77002a169a3566cc48dc774d2e13e3769"
   integrity sha512-uJ4Z7iPNwiu1foygbcZYJsJs1jiXrTTCvxfLDXNhI/I+NHbSIEyr548y4fcsCEyWY0XgfAG/qqaunJ1SThHenA==
 
-core-js@3, core-js@^3.1.4:
+core-js@2, core-js@^2.6.5:
+  version "2.6.9"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.9.tgz#6b4b214620c834152e179323727fc19741b084f2"
+  integrity sha512-HOpZf6eXmnl7la+cUdMnLvUxKNqLUzJvgIziQ0DiF3JwSImNphIqdGqzj6hIKyX04MmV0poclQ7+wjWvxQyR2A==
+
+core-js@^3.1.4:
   version "3.1.4"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.1.4.tgz#3a2837fc48e582e1ae25907afcd6cf03b0cc7a07"
   integrity sha512-YNZN8lt82XIMLnLirj9MhKDFZHalwzzrL9YLt6eb0T5D0EDl4IQ90IGkua8mHbnxNrkj1d8hbdizMc0Qmg1WnQ==