build(deps): upgrade TypeScript to 3.9.7

Author: jrolfs

package.json

@@ -107,7 +107,7 @@
     "rollup-plugin-size-snapshot": "^0.12.0",
     "rollup-plugin-terser": "^6.1.0",
     "semver": "^7.1.3",
-    "typescript": "^3.7.5",
+    "typescript": "^3.9.7",
     "which": "^2.0.2",
     "yargs-parser": "^18.1.3"
   },

yarn.lock

@@ -8724,10 +8724,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3.7.5:
-  version "3.9.6"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.6.tgz#8f3e0198a34c3ae17091b35571d3afd31999365a"
-  integrity sha512-Pspx3oKAPJtjNwE92YS05HQoY7z2SFyOpHo9MqJor3BXAGNaPUs83CuVp9VISFkSjyRfiTpmKuAYGJB7S7hOxw==
+typescript@^3.9.7:
+  version "3.9.7"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
+  integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
 
 underscore@~1.8.3:
   version "1.8.3"