chore: Restrict value import from highcharts with eslint rule (#50)

* chore: Restrict value import from highcharts with eslint rule

* update rule description

Author: pan-kot

.eslintrc

@@ -95,6 +95,19 @@
     "es6": true,
   },
   "overrides": [
+    {
+      "files": ["src/**"],
+      "excludedFiles": ["src/**/__tests__/**"],
+      "rules": {
+        "no-restricted-syntax": [
+          "error",
+          {
+            "selector": "ImportDeclaration[source.value='highcharts'][importKind='value']",
+            "message": "Use `import type Highcharts from 'highcharts'` instead of regular import.",
+          },
+        ],
+      },
+    },
     {
       "files": ["**/__integ__/**", "./test/**"],
       "rules": {