Ensure stable plugins get installed. (#1373)

src/plugins/nu_plugin_stable_average.rs

@@ -0,0 +1,6 @@
+use nu_plugin::serve_plugin;
+use nu_plugin_average::Average;
+
+fn main() {
+    serve_plugin(&mut Average::new());
+}

src/plugins/nu_plugin_stable_binaryview.rs

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+use nu_plugin::serve_plugin;
+use nu_plugin_binaryview::BinaryView;
+
+fn main() {
+    serve_plugin(&mut BinaryView::new());
+}

src/plugins/nu_plugin_stable_fetch.rs

@@ -0,0 +1,6 @@
+use nu_plugin::serve_plugin;
+use nu_plugin_fetch::Fetch;
+
+fn main() {
+    serve_plugin(&mut Fetch::new());
+}

src/plugins/nu_plugin_stable_match.rs

@@ -0,0 +1,7 @@
+use nu_plugin::serve_plugin;
+use nu_plugin_match::Match;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    serve_plugin(&mut Match::new()?);
+    Ok(())
+}

src/plugins/nu_plugin_stable_post.rs

@@ -0,0 +1,6 @@
+use nu_plugin::serve_plugin;
+use nu_plugin_post::Post;
+
+fn main() {
+    serve_plugin(&mut Post::new());
+}

src/plugins/nu_plugin_stable_sum.rs

@@ -0,0 +1,6 @@
+use nu_plugin::serve_plugin;
+use nu_plugin_sum::Sum;
+
+fn main() {
+    serve_plugin(&mut Sum::new());
+}

src/plugins/nu_plugin_stable_tree.rs

@@ -0,0 +1,6 @@
+use nu_plugin::serve_plugin;
+use nu_plugin_tree::TreeViewer;
+
+fn main() {
+    serve_plugin(&mut TreeViewer);
+}