tagHandler - Handle fallback html tag + basic test

Also added preact dep.
Fixed class or function component flowing into tagHandler

package-lock.json

@@ -4254,6 +4254,26 @@
       "integrity": "sha1-AerA/jta9xoqbAL+q7jB/vfgDqs=",
       "dev": true
     },
+    "preact": {
+      "version": "10.1.1",
+      "resolved": "https://registry.npmjs.org/preact/-/preact-10.1.1.tgz",
+      "integrity": "sha512-mKW7Cdn68XMhdes0FjyIbA8+IVPsj3aIuAEQlZVkj9E2VhujWcXZEfwirBoXK6qZYfj1djaTBDCFKjAu1sK93w=="
+    },
+    "preact-render-to-string": {
+      "version": "5.1.3",
+      "resolved": "https://registry.npmjs.org/preact-render-to-string/-/preact-render-to-string-5.1.3.tgz",
+      "integrity": "sha512-fVCd/qidYNiVSvN4cP5TVwI5VklMdrHMvcz0Z5mvwrYSKCrX0azInroBrKc5x6N9VtqMViMkYWaYh54cO6psIA==",
+      "requires": {
+        "pretty-format": "^3.8.0"
+      },
+      "dependencies": {
+        "pretty-format": {
+          "version": "3.8.0",
+          "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-3.8.0.tgz",
+          "integrity": "sha1-v77VbV6ad2ZF9LH/eqGjrE+jw4U="
+        }
+      }
+    },
     "prelude-ls": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",