fix resolveScript during build (#1069)

Author: mbostock

src/build.ts

@@ -238,6 +238,11 @@ export async function build(
           const r = resolvers.resolveImport(specifier);
           const a = aliases.get(resolvePath(path, r));
           return a ? relativePath(path, a) : isPathImport(specifier) ? specifier : r; // fallback to specifier if enoent
+        },
+        resolveScript(specifier) {
+          const r = resolvers.resolveScript(specifier);
+          const a = aliases.get(resolvePath(path, r));
+          return a ? relativePath(path, a) : specifier; // fallback to specifier if enoent
         }
       }
     });

test/output/build/imports/script.html

@@ -36,7 +36,7 @@
 <div id="observablehq-center">
 <main id="observablehq-main" class="observablehq">
 <h1 id="scripts" tabindex="-1"><a class="observablehq-header-anchor" href="#scripts">Scripts</a></h1>
-<script src="./_import/top.js?sha=160847a6b4890d59f8e8862911bfbe3b8066955d31f2708cafbe51945c3c57b6" type="module"></script>
+<script src="./_import/top.160847a6.js" type="module"></script>
 <script src="./_file/top.a53c5d5b.js" type="other"></script>
 </main>
 <footer id="observablehq-footer">