Try pin @babel/core

package.json

@@ -40,16 +40,16 @@
     "test:node:debug": "mocha debug node-tests"
   },
   "dependencies": {
-    "@babel/core": "^7.13.8",
+    "@babel/core": "7.12.0",
     "@babel/helper-compilation-targets": "^7.12.0",
     "@babel/plugin-proposal-class-properties": "^7.13.0",
     "@babel/plugin-proposal-decorators": "^7.13.5",
     "@babel/plugin-transform-modules-amd": "^7.13.0",
     "@babel/plugin-transform-runtime": "^7.13.9",
     "@babel/plugin-transform-typescript": "^7.13.0",
     "@babel/polyfill": "^7.12.1",
-    "@babel/preset-env": "^7.12.0",
-    "@babel/runtime": "^7.12.0",
+    "@babel/preset-env": "^7.13.9",
+    "@babel/runtime": "^7.13.9",
     "amd-name-resolver": "^1.3.1",
     "babel-plugin-debug-macros": "^0.3.4",
     "babel-plugin-ember-data-packages-polyfill": "^0.1.2",

yarn.lock

@@ -26,7 +26,7 @@
   resolved "https://registry.yarnpkg.com/@babel/compat-data/-/compat-data-7.13.8.tgz#5b783b9808f15cef71547f1b691f34f8ff6003a6"
   integrity sha512-EaI33z19T4qN3xLXsGf48M2cDqa6ei9tPZlfLdb2HC+e/cFtREiRd8hdSqDbwdLB0/+gLwqJmCYASH0z2bUdog==
 
-"@babel/core@^7.12.0", "@babel/core@^7.3.4", "@babel/core@^7.7.0":
+"@babel/core@7.12.0", "@babel/core@^7.12.0", "@babel/core@^7.3.4", "@babel/core@^7.7.0":
   version "7.12.0"
   resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.12.0.tgz#e42e07a086e978cdd4c61f4078d8230fb817cc86"
   integrity sha512-iV7Gwg0DePKvdDZZWRTkj4MW+6/AbVWd4ZCg+zk8H1RVt5xBpUZS6vLQWwb3pyLg4BFTaGiQCPoJ4Ibmbne4fA==
@@ -48,28 +48,6 @@
     semver "^5.4.1"
     source-map "^0.5.0"
 
-"@babel/core@^7.13.8":
-  version "7.13.8"
-  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.13.8.tgz#c191d9c5871788a591d69ea1dc03e5843a3680fb"
-  integrity sha512-oYapIySGw1zGhEFRd6lzWNLWFX2s5dA/jm+Pw/+59ZdXtjyIuwlXbrId22Md0rgZVop+aVoqow2riXhBLNyuQg==
-  dependencies:
-    "@babel/code-frame" "^7.12.13"
-    "@babel/generator" "^7.13.0"
-    "@babel/helper-compilation-targets" "^7.13.8"
-    "@babel/helper-module-transforms" "^7.13.0"
-    "@babel/helpers" "^7.13.0"
-    "@babel/parser" "^7.13.4"
-    "@babel/template" "^7.12.13"
-    "@babel/traverse" "^7.13.0"
-    "@babel/types" "^7.13.0"
-    convert-source-map "^1.7.0"
-    debug "^4.1.0"
-    gensync "^1.0.0-beta.2"
-    json5 "^2.1.2"
-    lodash "^4.17.19"
-    semver "^6.3.0"
-    source-map "^0.5.0"
-
 "@babel/generator@^7.12.0", "@babel/generator@^7.13.0":
   version "7.13.9"
   resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.13.9.tgz#3a7aa96f9efb8e2be42d38d80e2ceb4c64d8de39"
@@ -406,15 +384,6 @@
     "@babel/traverse" "^7.10.4"
     "@babel/types" "^7.10.4"
 
-"@babel/helpers@^7.13.0":
-  version "7.13.0"
-  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.13.0.tgz#7647ae57377b4f0408bf4f8a7af01c42e41badc0"
-  integrity sha512-aan1MeFPxFacZeSz6Ld7YZo5aPuqnKlD7+HZY75xQsueczFccP9A7V05+oe0XpLwHK3oLorPe9eaAUljL7WEaQ==
-  dependencies:
-    "@babel/template" "^7.12.13"
-    "@babel/traverse" "^7.13.0"
-    "@babel/types" "^7.13.0"
-
 "@babel/highlight@^7.10.4", "@babel/highlight@^7.12.13":
   version "7.13.8"
   resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.13.8.tgz#10b2dac78526424dfc1f47650d0e415dfd9dc481"
@@ -424,7 +393,7 @@
     chalk "^2.0.0"
     js-tokens "^4.0.0"
 
-"@babel/parser@^7.12.0", "@babel/parser@^7.12.13", "@babel/parser@^7.13.0", "@babel/parser@^7.13.4":
+"@babel/parser@^7.12.0", "@babel/parser@^7.12.13", "@babel/parser@^7.13.0":
   version "7.13.9"
   resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.13.9.tgz#ca34cb95e1c2dd126863a84465ae8ef66114be99"
   integrity sha512-nEUfRiARCcaVo3ny3ZQjURjHQZUo/JkEw7rLlSZy/psWGnvwXFtPcr6jb7Yb41DVW5LTe6KRq9LGleRNsg1Frw==
@@ -1342,7 +1311,7 @@
     core-js "^2.6.5"
     regenerator-runtime "^0.13.4"
 
-"@babel/preset-env@^7.12.0":
+"@babel/preset-env@^7.13.9":
   version "7.13.9"
   resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.13.9.tgz#3ee5f233316b10d066d7f379c6d1e13a96853654"
   integrity sha512-mcsHUlh2rIhViqMG823JpscLMesRt3QbMsv1+jhopXEb3W2wXvQ9QoiOlZI9ZbR3XqPtaFpZwEZKYqGJnGMZTQ==
@@ -1511,7 +1480,7 @@
     "@babel/types" "^7.4.4"
     esutils "^2.0.2"
 
-"@babel/runtime@^7.12.0":
+"@babel/runtime@^7.13.9":
   version "7.13.9"
   resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.13.9.tgz#97dbe2116e2630c489f22e0656decd60aaa1fcee"
   integrity sha512-aY2kU+xgJ3dJ1eU6FMB9EH8dIe8dmusF1xEku52joLvw6eAFN0AI+WxCLDnpev2LEejWBAy2sBvBOBAjI3zmvA==
@@ -5641,11 +5610,6 @@ gensync@^1.0.0-beta.1:
   resolved "https://registry.yarnpkg.com/gensync/-/gensync-1.0.0-beta.1.tgz#58f4361ff987e5ff6e1e7a210827aa371eaac269"
   integrity sha512-r8EC6NO1sngH/zdD9fiRDLdcgnbayXah+mLgManTaIZJqEC1MZstmnox8KpnI2/fxQwrp5OpCOYWLp4rBl4Jcg==
 
-gensync@^1.0.0-beta.2:
-  version "1.0.0-beta.2"
-  resolved "https://registry.yarnpkg.com/gensync/-/gensync-1.0.0-beta.2.tgz#32a6ee76c3d7f52d46b2b1ae5d93fea8580a25e0"
-  integrity sha512-3hN7NaskYvMDLQY55gnW3NQ+mesEAepTqlg+VEbj7zzqEMBVNhzcGYYeqFo/TlYz6eQiFcp1HcsCZO+nGgS8zg==
-
 get-caller-file@^1.0.0, get-caller-file@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-1.0.3.tgz#f978fa4c90d1dfe7ff2d6beda2a515e713bdcf4a"