add Callbag typings

package-lock.json

@@ -1573,6 +1573,11 @@
       "integrity": "sha1-JtII6onje1y95gJQoV8DHBak1ms=",
       "dev": true
     },
+    "callbag": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/callbag/-/callbag-1.2.0.tgz",
+      "integrity": "sha512-RMcVOk2oyA8CyCt/HsLEvnvvttKlaGVaG0uOo5IY7RpdiPLhStjxv5oYre33VJfT8kJE+cuKLSNHooz7yCUdhQ=="
+    },
     "caller-callsite": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/caller-callsite/-/caller-callsite-2.0.0.tgz",

package.json

@@ -16,5 +16,8 @@
     "rimraf": "^3.0.0",
     "sass": "^1.23.7",
     "typescript": "^3.7.3"
+  },
+  "dependencies": {
+    "callbag": "^1.2.0"
   }
 }

tsconfig.json

@@ -2,6 +2,7 @@
     "compilerOptions": {
         "alwaysStrict": true,
         "experimentalDecorators": true,
+        "moduleResolution": "node",
         "strict": true,
         "target": "es2015",
     }