treat npm_typescript as a dev dependency (google#8719)

Treat flatbuffers' definition of npm_typescript as a dev dependency, in order to avoid conflicts when consuming flatbuffers in a repo that also depends on aspect_rules_ts.

Author: dws

MODULE.bazel

@@ -72,6 +72,6 @@ use_repo(npm, "flatbuffers_npm")
 node = use_extension("@rules_nodejs//nodejs:extensions.bzl", "node")
 use_repo(node, "nodejs_linux_amd64")
 
-rules_ts_ext = use_extension("@aspect_rules_ts//ts:extensions.bzl", "ext")
+rules_ts_ext = use_extension("@aspect_rules_ts//ts:extensions.bzl", "ext", dev_dependency = True)
 rules_ts_ext.deps()
 use_repo(rules_ts_ext, "npm_typescript")