Update the language server to 0.13.0 (#4343)

This update includes a small linting fix as well as highlighting support
for heredocs.

Signed-off-by: Remy Suen <[email protected]>

Author: rcjsuen

package-lock.json

@@ -3004,7 +3004,7 @@
         "@microsoft/vscode-container-client": "^0.1.1",
         "@microsoft/vscode-docker-registries": "^0.1.11",
         "dayjs": "^1.11.7",
-        "dockerfile-language-server-nodejs": "^0.12.0",
+        "dockerfile-language-server-nodejs": "^0.13.0",
         "fs-extra": "^11.1.1",
         "gradle-to-js": "^2.0.1",
         "handlebars": "^4.7.7",