Add dynamic version string to build process

The version is taken from the package.json file and replaced in the 
html.

projects/editor/src/html_wrapper/index.html

@@ -5,7 +5,7 @@
     <title>Verona Editor Aspect</title>
 
     <meta name="application-name" content="iqb-editor-aspect"
-          data-version="0.1.0"
+          data-version="version-placeholder"
           data-api-version="2.0.0"
           data-repository-url="https://github.com/iqb-berlin/verona-modules-apect"
           data-supported-unit-definition-types="iqb-aspect-module@0.0.1"/>
@@ -30,7 +30,7 @@
           "de": "TODO",
           "en": "TODO"
         },
-        "version": "0.1.0",
+        "version": "version-placeholder",
         "apiVersion": "2.0",
         "repository": {
           "type": "git",

projects/player/src/html_wrapper/index.html

@@ -5,7 +5,7 @@
   <title>Verona Player Aspect</title>
 
   <meta name="application-name" content="iqb-player-aspect"
-        data-version="0.1.0"
+        data-version="version-placeholder"
         data-repository-url="https://github.com/iqb-berlin/verona-modules-apect"
         data-api-version="3.0.0"
         data-not-supported-api-features=""
@@ -34,7 +34,7 @@
         "de": "TODO",
         "en": "TODO"
       },
-      "version": "0.1.0",
+      "version": "version-placeholder",
       "apiVersion": "3.0.0",
       "repository": {
         "type": "git",

scripts/wrap_and_pack.js

@@ -10,7 +10,8 @@ const wrapperPath = process.argv[4];
 childProcess.fork('node_modules/iqb-dev-components/src/js_css_packer.js',
   ['dist', packageName, 'dist']);
 
-const fileContent = fs.readFileSync(wrapperPath, 'utf8').toString();
+const fileContent = fs.readFileSync(wrapperPath, 'utf8').toString()
+  .replace(/version-placeholder/g, packageVersion);
 fs.writeFileSync('dist/index.html', fileContent, 'utf8');
 
 const targetFileName = `verona-${packageName}-aspect-${packageVersion}.html`;