Update libiconv from 1.17 to 1.18 [emscripten-3.1.73] (#1578)

* Update libiconv from 1.17 to 1.18 [emscripten-3.1.73]

* Update recipe.yaml

---------

Co-authored-by: emscripten-forge-bot <emscripten-forge-bot@users.noreply.github.com>
Co-authored-by: Thorsten Beier <derthorstenbeier@gmail.com>

recipes/recipes_emscripten/libiconv/recipe.yaml

@@ -1,16 +1,16 @@
 context:
-  version: '1.17'
+  version: '1.18'
 
 package:
   name: libiconv
   version: ${{ version }}
 
 source:
 - url: https://ftp.gnu.org/pub/gnu/libiconv/libiconv-${{ version }}.tar.gz
-  sha256: 8f74213b56238c85a50a5329f77e06198771e70dd9a739779f4c02f65d971313
+  sha256: 3b08f5f4f9b4eb82f151a7040bfd6fe6c6fb922efe4b1659c66ea933276965e8
 
 build:
-  number: 3
+  number: 0
 
 requirements:
   build:
@@ -23,10 +23,10 @@ tests:
     include:
     - iconv.h
 - script:
-    - node ${PREFIX}/bin/iconv --version
+  - node ${PREFIX}/bin/iconv --version
   requirements:
     build:
-      - nodejs
+    - nodejs
 
 about:
   homepage: https://www.gnu.org/software/libiconv/