fix(dom): support TypeScript's strict mode

dom/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cycle/dom",
-  "version": "22.1.0",
+  "version": "22.2.0-rc.0",
   "description": "The standard DOM Driver for Cycle.js, based on Snabbdom",
   "license": "MIT",
   "homepage": "https://cycle.js.org",
@@ -49,22 +49,21 @@
     "prepublishOnly": "pnpm run build && pnpm run test"
   },
   "dependencies": {
-    "@cycle/run": "^5.1.0",
-    "rxjs": "^6.3.3",
+    "@cycle/run": "^5.2.0-rc.4",
     "snabbdom": "^0.7.2",
-    "snabbdom-selector": "^4.0.0",
+    "snabbdom-selector": "^4.1.0",
     "xstream": "*"
   },
   "devDependencies": {
     "@cycle/isolate": "^4.1.0",
-    "@cycle/rxjs-run": "^10.0.0",
+    "@cycle/rxjs-run": "^10.2.0-rc.7",
     "@types/mocha": "^5.2.5",
-    "@types/node": "^10.11.7",
-    "@types/sinon": "^5.0.5",
+    "@types/node": "^10.12.11",
+    "@types/sinon": "^5.0.7",
     "deepmerge": "^2.2.1",
     "es6-map": "^0.1.5",
     "es6-set": "^0.1.5",
-    "karma": "^3.0.0",
+    "karma": "^3.1.3",
     "karma-browserstack-launcher": "^1.3.0",
     "karma-chrome-launcher": "^2.2.0",
     "karma-firefox-launcher": "^1.1.0",
@@ -73,13 +72,14 @@
     "mocha": "^5.2.0",
     "most": "^1.7.3",
     "mutation-observer": "1.0.3",
+    "rxjs": "^6.3.3",
     "simulant": "^0.2.2",
-    "sinon": "^6.3.5",
-    "snabbdom-pragma": "^2.7.0",
+    "sinon": "^7.1.1",
+    "snabbdom-pragma": "^2.8.0",
     "symbol-observable": "^1.2.0",
     "ts-node": "^7.0.1",
     "tslint": "^5.11.0",
-    "typescript": "3.1.x",
+    "typescript": "^3.1.6",
     "xstream": "11.x"
   },
   "engines": {