[parser] Better error message for missing number exponent (#12072)

* fix(babel-parser) better error message for missing number exponent after 'e'

* fix(babel-parser) requested changes

* msg

Co-authored-by: Brian Ng <bng412@gmail.com>

packages/babel-parser/src/parser/error-message.js

@@ -77,6 +77,8 @@ export const ErrorMessages = Object.freeze({
   InvalidLhs: "Invalid left-hand side in %0",
   InvalidLhsBinding: "Binding invalid left-hand side in %0",
   InvalidNumber: "Invalid number",
+  InvalidOrMissingExponent:
+    "Floating-point numbers require a valid exponent after the 'e'",
   InvalidOrUnexpectedToken: "Unexpected character '%0'",
   InvalidParenthesizedAssignment: "Invalid parenthesized assignment pattern",
   InvalidPrivateFieldResolution: "Private name #%0 is not defined",