diff --git a/package.json b/package.json
index 6d480c7..4ab4838 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "istanbul": "^0.4.5",
     "node-fetch": "^2.6.1",
     "nyc": "^15.1.0",
-    "teenytest": "^6.0.2",
+    "teenytest": "^6.0.5",
     "testdouble": "^3.16.1"
   },
   "scripts": {
diff --git a/yarn.lock b/yarn.lock
index 155e100..56d5e9e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -388,11 +388,10 @@ async@1.x:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
 
-async@^2.6.2:
-  version "2.6.2"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.6.2.tgz#18330ea7e6e313887f5d2f2a904bac6fe4dd5381"
-  dependencies:
-    lodash "^4.17.11"
+async@^3.2.4:
+  version "3.2.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-3.2.4.tgz#2d22e00f8cddeb5fde5dd33522b56d1cf569a81c"
+  integrity sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ==
 
 asynckit@^0.4.0:
   version "0.4.0"
@@ -449,6 +448,13 @@ brace-expansion@^1.1.7:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
+brace-expansion@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-2.0.1.tgz#1edc459e0f0c548486ecf9fc99f2221364b9a0ae"
+  integrity sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==
+  dependencies:
+    balanced-match "^1.0.0"
+
 browser-process-hrtime@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/browser-process-hrtime/-/browser-process-hrtime-1.0.0.tgz#3c9b4b7d782c8121e56f10106d84c0d0ffc94626"
@@ -1350,6 +1356,17 @@ glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, glob@^7.1.6:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
+glob@^8.1.0:
+  version "8.1.0"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-8.1.0.tgz#d388f656593ef708ee3e34640fdfb99a9fd1c33e"
+  integrity sha512-r8hpEjiQEYlF2QU0df3dS+nxxSIreXQS1qRhMJM0Q5NDdR386C7jb7Hwwod8Fgiuex+k0GFjgft18yvxm5XoCQ==
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^5.0.1"
+    once "^1.3.0"
+
 globals@^11.0.1, globals@^11.1.0:
   version "11.12.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-11.12.0.tgz#ab8795338868a0babd8525758018c2a7eb95c42e"
@@ -1562,6 +1579,13 @@ is-callable@^1.2.0:
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.2.0.tgz#83336560b54a38e35e3a2df7afd0454d691468bb"
   integrity sha512-pyVD9AaGLxtg6srb2Ng6ynWJqkHU9bEM087AKck0w8QwDarTfNcpIYoU8x8Hv2Icm8u6kFJM18Dag8lyqGkviw==
 
+is-core-module@^2.9.0:
+  version "2.11.0"
+  resolved "https://registry.yarnpkg.com/is-core-module/-/is-core-module-2.11.0.tgz#ad4cb3e3863e814523c96f3f58d26cc570ff0144"
+  integrity sha512-RRjxlvLDkD1YJwDbroBHMb+cukurkDWNyHx7D3oNB5x9rb5ogcksMC5wHCadcXoo67gVr/+3GFySh3134zi6rw==
+  dependencies:
+    has "^1.0.3"
+
 is-date-object@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.1.tgz#9aa20eb6aeebbff77fbd33e74ca01b33581d3a16"
@@ -1890,9 +1914,10 @@ locate-path@^5.0.0:
   dependencies:
     p-locate "^4.1.0"
 
-lodash-deeper@^1.0.0:
+lodash-deeper@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/lodash-deeper/-/lodash-deeper-1.1.0.tgz#5af51f33cb0bf5e24a08187c326b779a17e489dc"
+  integrity sha512-mGP/vyEfa+zN472AcjBuSCmt4xopShg+ZZBUmNE7HFP0bcjRvC0doAaKbqgWiPstgw8dtHTHl4QuQJwqNC+Erg==
   dependencies:
     lodash ">=4.13.1"
 
@@ -1904,12 +1929,7 @@ lodash.sortby@^4.7.0:
   version "4.7.0"
   resolved "https://registry.yarnpkg.com/lodash.sortby/-/lodash.sortby-4.7.0.tgz#edd14c824e2cc9c1e0b0a1b42bb5210516a42438"
 
-lodash@>=4.13.1, lodash@^4.17.11, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15:
-  version "4.17.20"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
-  integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
-
-lodash@^4.17.4, lodash@^4.3.0:
+lodash@>=4.13.1, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.21, lodash@^4.17.4, lodash@^4.3.0:
   version "4.17.21"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
   integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
@@ -1981,10 +2001,17 @@ mimic-fn@^1.0.0:
   dependencies:
     brace-expansion "^1.1.7"
 
-minimist@^1.2.0, minimist@^1.2.5:
-  version "1.2.5"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
-  integrity sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==
+minimatch@^5.0.1:
+  version "5.1.6"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-5.1.6.tgz#1cfcb8cf5522ea69952cd2af95ae09477f122a96"
+  integrity sha512-lKwV/1brpG6mBUFHtb7NUmtABCb2WZZmm2wNiOA5hAb8VdCS4B3dtMWyvcoViccwAW/COERjXLt0zP1zXUN26g==
+  dependencies:
+    brace-expansion "^2.0.1"
+
+minimist@^1.2.0, minimist@^1.2.5, minimist@^1.2.8:
+  version "1.2.8"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.8.tgz#c1a464e7693302e082a075cee0c057741ac4772c"
+  integrity sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA==
 
 minimist@~0.0.1:
   version "0.0.10"
@@ -2279,9 +2306,10 @@ path-key@^3.1.0:
   resolved "https://registry.yarnpkg.com/path-key/-/path-key-3.1.1.tgz#581f6ade658cbba65a0d3380de7753295054f375"
   integrity sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==
 
-path-parse@^1.0.6:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
+path-parse@^1.0.7:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.7.tgz#fbc114b60ca42b30d9daf5858e4bd68bbedb6735"
+  integrity sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==
 
 path-to-regexp@0.1.7:
   version "0.1.7"
@@ -2506,12 +2534,14 @@ resolve@1.1.x:
   version "1.1.7"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.1.7.tgz#203114d82ad2c5ed9e8e0411b3932875e889e97b"
 
-resolve@^1.10.0, resolve@^1.10.1, resolve@^1.11.1, resolve@^1.13.1, resolve@^1.17.0, resolve@^1.3.2:
-  version "1.17.0"
-  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.17.0.tgz#b25941b54968231cc2d1bb76a79cb7f2c0bf8444"
-  integrity sha512-ic+7JYiV8Vi2yzQGFWOkiZD5Z9z7O2Zhm9XMaTxdJExKasieFCr+yXZ/WmXsckHiKl12ar0y6XiXDx3m4RHn1w==
+resolve@^1.10.1, resolve@^1.11.1, resolve@^1.13.1, resolve@^1.17.0, resolve@^1.22.1, resolve@^1.3.2:
+  version "1.22.1"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.22.1.tgz#27cb2ebb53f91abb49470a928bba7558066ac177"
+  integrity sha512-nBpuuYuY5jFsli/JIs1oldw6fOQCBioohqWZg/2hiaOybXOft4lonv85uDOKXdf8rhyK159cxU5cDcK/NKk8zw==
   dependencies:
-    path-parse "^1.0.6"
+    is-core-module "^2.9.0"
+    path-parse "^1.0.7"
+    supports-preserve-symlinks-flag "^1.0.0"
 
 restore-cursor@^2.0.0:
   version "2.0.0"
@@ -2845,6 +2875,11 @@ supports-color@^7.1.0:
   dependencies:
     has-flag "^4.0.0"
 
+supports-preserve-symlinks-flag@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz#6eda4bd344a3c94aea376d4cc31bc77311039e09"
+  integrity sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==
+
 symbol-tree@^3.2.4:
   version "3.2.4"
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.4.tgz#430637d248ba77e078883951fb9aa0eed7c63fa2"
@@ -2862,18 +2897,18 @@ table@4.0.2:
     slice-ansi "1.0.0"
     string-width "^2.1.1"
 
-teenytest@^6.0.2:
-  version "6.0.2"
-  resolved "https://registry.yarnpkg.com/teenytest/-/teenytest-6.0.2.tgz#1c2f42057f3320c0798ae6d88c30d95932e7ecac"
-  integrity sha512-54ATJlqxe3uZt+MABHLI9oouwNQT+/vauiWaoIFpvYq3lVS70e5/EOqnqt0qc92XyawdQTUe3BA7DW5nwQ4oUQ==
+teenytest@^6.0.5:
+  version "6.0.5"
+  resolved "https://registry.yarnpkg.com/teenytest/-/teenytest-6.0.5.tgz#e50e22cefa6f3d1f5fefd0060850761edd5b7270"
+  integrity sha512-5Eei4dcklNVg4PKxUijOZi2FSOw9we/XLWUAN/7oI+WntzPv45XGJSlhUaaRziJ7vQwIGi4KiaTbus719FC2Ig==
   dependencies:
-    async "^2.6.2"
+    async "^3.2.4"
     function-names-at-line "^1.1.0"
-    glob "^7.1.3"
-    lodash "^4.17.11"
-    lodash-deeper "^1.0.0"
-    minimist "^1.2.0"
-    resolve "^1.10.0"
+    glob "^8.1.0"
+    lodash "^4.17.21"
+    lodash-deeper "^1.1.0"
+    minimist "^1.2.8"
+    resolve "^1.22.1"
 
 test-exclude@^6.0.0:
   version "6.0.0"