feat: truncate short description exceeding the byte limit (#143)

* feat: truncate short description exceeding the byte limit

* fix tests

src/utils.ts

@@ -0,0 +1,14 @@
+import unicodeSubstring = require('unicode-substring')
+
+export function getErrorMessage(error: unknown) {
+  if (error instanceof Error) return error.message
+  return String(error)
+}
+
+export function truncateToBytes(s: string, n: number): string {
+  let len = n
+  while (Buffer.byteLength(s) > n) {
+    s = unicodeSubstring(s, 0, len--)
+  }
+  return s
+}