fix(cli): Don't strip shebangs from modules (#13220)

Deno's module loader currently strips a shebang if a module file
starts with one. However, this is no longer necessary, since there is
a stage-3 TC39 that adds support for shebangs (or "hashbangs") to the
language (https://github.com/tc39/proposal-hashbang), and V8, `tsc`
and `swc` all support it.

Furthermore, stripping shebangs causes a correctness bug with JSON
modules, since a JSON file with a shebang should not parse as a JSON
module, yet it does with this stripping. This change fixes this.

1 files changed, 5 insertions, 0 deletions

diff --git a/cli/tests/testdata/shebang.ts b/cli/tests/testdata/shebang.ts
new file mode 100644
index 000000000..00feb2da0
--- /dev/null
+++ b/cli/tests/testdata/shebang.ts
@@ -0,0 +1,5 @@
+#!/usr/bin/env -S deno run
+
+import test from "./shebang2.ts";
+
+console.log(test as number);