Tests about support of HTML tags in translations keys with GetText (#172)

- Verify that html tags are supported in translation keys
- Add typed support of gettext-parser

package-lock.json

@@ -136,6 +136,15 @@
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       "dev": true
     },
+    "@types/gettext-parser": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/@types/gettext-parser/-/gettext-parser-4.0.0.tgz",
+      "integrity": "sha512-I/wvhr+l5M7IwBF1ADBfNQ6qGfUg85UTjj/AZWn09Y+POqyLe1cfbdJSMWzCobiJ3EJNY23MQCbP6jxQT81OTQ==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/glob": {
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.1.1.tgz",