feat: renderSync, parseAndRenderSync and renderFileSync, see #48

src/template/value.ts

@@ -47,10 +47,17 @@ export class Value {
     }
     this.filters.push(new Filter(name, args, this.strictFilters))
   }
-  public value (ctx: Context) {
-    let val = new Expression(this.initial).evaluate(ctx)
+  public async value (ctx: Context) {
+    let val = await new Expression(this.initial).evaluate(ctx)
     for (const filter of this.filters) {
-      val = filter.render(val, ctx)
+      val = await filter.render(val, ctx)
+    }
+    return val
+  }
+  public valueSync (ctx: Context) {
+    let val = new Expression(this.initial).evaluateSync(ctx)
+    for (const filter of this.filters) {
+      val = filter.renderSync(val, ctx)
     }
     return val
   }