diff --git a/package.json b/package.json
index f451819..8dca735 100644
--- a/package.json
+++ b/package.json
@@ -34,8 +34,8 @@
     "@types/jest": "26.0.20",
     "@types/react": "16.9.46",
     "@types/react-dom": "16.9.8",
-    "@typescript-eslint/eslint-plugin": "4.4.1",
-    "@typescript-eslint/parser": "4.4.1",
+    "@typescript-eslint/eslint-plugin": "4.20.0",
+    "@typescript-eslint/parser": "4.21.0",
     "canvas": "2.6.1",
     "codecov": "3.8.0",
     "coveralls": "3.1.0",
diff --git a/yarn.lock b/yarn.lock
index 343fb24..82311f1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1078,28 +1078,29 @@
   dependencies:
     "@types/yargs-parser" "*"
 
-"@typescript-eslint/eslint-plugin@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.4.1.tgz#b8acea0373bd2a388ac47df44652f00bf8b368f5"
-  integrity sha512-O+8Utz8pb4OmcA+Nfi5THQnQpHSD2sDUNw9AxNHpuYOo326HZTtG8gsfT+EAYuVrFNaLyNb2QnUNkmTRDskuRA==
+"@typescript-eslint/eslint-plugin@4.20.0":
+  version "4.20.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.20.0.tgz#9d8794bd99aad9153092ad13c96164e3082e9a92"
+  integrity sha512-sw+3HO5aehYqn5w177z2D82ZQlqHCwcKSMboueo7oE4KU9QiC0SAgfS/D4z9xXvpTc8Bt41Raa9fBR8T2tIhoQ==
   dependencies:
-    "@typescript-eslint/experimental-utils" "4.4.1"
-    "@typescript-eslint/scope-manager" "4.4.1"
+    "@typescript-eslint/experimental-utils" "4.20.0"
+    "@typescript-eslint/scope-manager" "4.20.0"
     debug "^4.1.1"
     functional-red-black-tree "^1.0.1"
+    lodash "^4.17.15"
     regexpp "^3.0.0"
     semver "^7.3.2"
     tsutils "^3.17.1"
 
-"@typescript-eslint/experimental-utils@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-4.4.1.tgz#40613b9757fa0170de3e0043254dbb077cafac0c"
-  integrity sha512-Nt4EVlb1mqExW9cWhpV6pd1a3DkUbX9DeyYsdoeziKOpIJ04S2KMVDO+SEidsXRH/XHDpbzXykKcMTLdTXH6cQ==
+"@typescript-eslint/experimental-utils@4.20.0":
+  version "4.20.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-4.20.0.tgz#a8ab2d7b61924f99042b7d77372996d5f41dc44b"
+  integrity sha512-sQNlf6rjLq2yB5lELl3gOE7OuoA/6IVXJUJ+Vs7emrQMva14CkOwyQwD7CW+TkmOJ4Q/YGmoDLmbfFrpGmbKng==
   dependencies:
     "@types/json-schema" "^7.0.3"
-    "@typescript-eslint/scope-manager" "4.4.1"
-    "@typescript-eslint/types" "4.4.1"
-    "@typescript-eslint/typescript-estree" "4.4.1"
+    "@typescript-eslint/scope-manager" "4.20.0"
+    "@typescript-eslint/types" "4.20.0"
+    "@typescript-eslint/typescript-estree" "4.20.0"
     eslint-scope "^5.0.0"
     eslint-utils "^2.0.0"
 
@@ -1113,28 +1114,41 @@
     eslint-scope "^5.0.0"
     eslint-utils "^2.0.0"
 
-"@typescript-eslint/parser@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-4.4.1.tgz#25fde9c080611f303f2f33cedb145d2c59915b80"
-  integrity sha512-S0fuX5lDku28Au9REYUsV+hdJpW/rNW0gWlc4SXzF/kdrRaAVX9YCxKpziH7djeWT/HFAjLZcnY7NJD8xTeUEg==
+"@typescript-eslint/parser@4.21.0":
+  version "4.21.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-4.21.0.tgz#a227fc2af4001668c3e3f7415d4feee5093894c1"
+  integrity sha512-eyNf7QmE5O/l1smaQgN0Lj2M/1jOuNg2NrBm1dqqQN0sVngTLyw8tdCbih96ixlhbF1oINoN8fDCyEH9SjLeIA==
   dependencies:
-    "@typescript-eslint/scope-manager" "4.4.1"
-    "@typescript-eslint/types" "4.4.1"
-    "@typescript-eslint/typescript-estree" "4.4.1"
+    "@typescript-eslint/scope-manager" "4.21.0"
+    "@typescript-eslint/types" "4.21.0"
+    "@typescript-eslint/typescript-estree" "4.21.0"
     debug "^4.1.1"
 
-"@typescript-eslint/scope-manager@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-4.4.1.tgz#d19447e60db2ce9c425898d62fa03b2cce8ea3f9"
-  integrity sha512-2oD/ZqD4Gj41UdFeWZxegH3cVEEH/Z6Bhr/XvwTtGv66737XkR4C9IqEkebCuqArqBJQSj4AgNHHiN1okzD/wQ==
+"@typescript-eslint/scope-manager@4.20.0":
+  version "4.20.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-4.20.0.tgz#953ecbf3b00845ece7be66246608be9d126d05ca"
+  integrity sha512-/zm6WR6iclD5HhGpcwl/GOYDTzrTHmvf8LLLkwKqqPKG6+KZt/CfSgPCiybshmck66M2L5fWSF/MKNuCwtKQSQ==
+  dependencies:
+    "@typescript-eslint/types" "4.20.0"
+    "@typescript-eslint/visitor-keys" "4.20.0"
+
+"@typescript-eslint/scope-manager@4.21.0":
+  version "4.21.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-4.21.0.tgz#c81b661c4b8af1ec0c010d847a8f9ab76ab95b4d"
+  integrity sha512-kfOjF0w1Ix7+a5T1knOw00f7uAP9Gx44+OEsNQi0PvvTPLYeXJlsCJ4tYnDj5PQEYfpcgOH5yBlw7K+UEI9Agw==
   dependencies:
-    "@typescript-eslint/types" "4.4.1"
-    "@typescript-eslint/visitor-keys" "4.4.1"
+    "@typescript-eslint/types" "4.21.0"
+    "@typescript-eslint/visitor-keys" "4.21.0"
+
+"@typescript-eslint/types@4.20.0":
+  version "4.20.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.20.0.tgz#c6cf5ef3c9b1c8f699a9bbdafb7a1da1ca781225"
+  integrity sha512-cYY+1PIjei1nk49JAPnH1VEnu7OYdWRdJhYI5wiKOUMhLTG1qsx5cQxCUTuwWCmQoyriadz3Ni8HZmGSofeC+w==
 
-"@typescript-eslint/types@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.4.1.tgz#c507b35cf523bc7ba00aae5f75ee9b810cdabbc1"
-  integrity sha512-KNDfH2bCyax5db+KKIZT4rfA8rEk5N0EJ8P0T5AJjo5xrV26UAzaiqoJCxeaibqc0c/IvZxp7v2g3difn2Pn3w==
+"@typescript-eslint/types@4.21.0":
+  version "4.21.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.21.0.tgz#abdc3463bda5d31156984fa5bc316789c960edef"
+  integrity sha512-+OQaupjGVVc8iXbt6M1oZMwyKQNehAfLYJJ3SdvnofK2qcjfor9pEM62rVjBknhowTkh+2HF+/KdRAc/wGBN2w==
 
 "@typescript-eslint/typescript-estree@2.34.0":
   version "2.34.0"
@@ -1149,26 +1163,46 @@
     semver "^7.3.2"
     tsutils "^3.17.1"
 
-"@typescript-eslint/typescript-estree@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.4.1.tgz#598f6de488106c2587d47ca2462c60f6e2797cb8"
-  integrity sha512-wP/V7ScKzgSdtcY1a0pZYBoCxrCstLrgRQ2O9MmCUZDtmgxCO/TCqOTGRVwpP4/2hVfqMz/Vw1ZYrG8cVxvN3g==
+"@typescript-eslint/typescript-estree@4.20.0":
+  version "4.20.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.20.0.tgz#8b3b08f85f18a8da5d88f65cb400f013e88ab7be"
+  integrity sha512-Knpp0reOd4ZsyoEJdW8i/sK3mtZ47Ls7ZHvD8WVABNx5Xnn7KhenMTRGegoyMTx6TiXlOVgMz9r0pDgXTEEIHA==
   dependencies:
-    "@typescript-eslint/types" "4.4.1"
-    "@typescript-eslint/visitor-keys" "4.4.1"
+    "@typescript-eslint/types" "4.20.0"
+    "@typescript-eslint/visitor-keys" "4.20.0"
     debug "^4.1.1"
     globby "^11.0.1"
     is-glob "^4.0.1"
-    lodash "^4.17.15"
     semver "^7.3.2"
     tsutils "^3.17.1"
 
-"@typescript-eslint/visitor-keys@4.4.1":
-  version "4.4.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.4.1.tgz#1769dc7a9e2d7d2cfd3318b77ed8249187aed5c3"
-  integrity sha512-H2JMWhLaJNeaylSnMSQFEhT/S/FsJbebQALmoJxMPMxLtlVAMy2uJP/Z543n9IizhjRayLSqoInehCeNW9rWcw==
+"@typescript-eslint/typescript-estree@4.21.0":
+  version "4.21.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.21.0.tgz#3817bd91857beeaeff90f69f1f112ea58d350b0a"
+  integrity sha512-ZD3M7yLaVGVYLw4nkkoGKumb7Rog7QID9YOWobFDMQKNl+vPxqVIW/uDk+MDeGc+OHcoG2nJ2HphwiPNajKw3w==
+  dependencies:
+    "@typescript-eslint/types" "4.21.0"
+    "@typescript-eslint/visitor-keys" "4.21.0"
+    debug "^4.1.1"
+    globby "^11.0.1"
+    is-glob "^4.0.1"
+    semver "^7.3.2"
+    tsutils "^3.17.1"
+
+"@typescript-eslint/visitor-keys@4.20.0":
+  version "4.20.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.20.0.tgz#1e84db034da13f208325e6bfc995c3b75f7dbd62"
+  integrity sha512-NXKRM3oOVQL8yNFDNCZuieRIwZ5UtjNLYtmMx2PacEAGmbaEYtGgVHUHVyZvU/0rYZcizdrWjDo+WBtRPSgq+A==
+  dependencies:
+    "@typescript-eslint/types" "4.20.0"
+    eslint-visitor-keys "^2.0.0"
+
+"@typescript-eslint/visitor-keys@4.21.0":
+  version "4.21.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.21.0.tgz#990a9acdc124331f5863c2cf21c88ba65233cd8d"
+  integrity sha512-dH22dROWGi5Z6p+Igc8bLVLmwy7vEe8r+8c+raPQU0LxgogPUrRAtRGtvBWmlr9waTu3n+QLt/qrS/hWzk1x5w==
   dependencies:
-    "@typescript-eslint/types" "4.4.1"
+    "@typescript-eslint/types" "4.21.0"
     eslint-visitor-keys "^2.0.0"
 
 JSONStream@^1.0.4, JSONStream@^1.3.4, JSONStream@^1.3.5: