Test migration to jest by hand

Apparently using regular expressions is way easier.

test/size/size.js

@@ -0,0 +1,9 @@
+const size = val =>
+Array.isArray(val)
+? val.length
+: val && typeof val === 'object'
+? val.size || val.length || Object.keys(val).length
+: typeof val === 'string'
+? new Blob([val]).size
+: 0;
+module.exports = size;