fix(core): do not pin lit-html version and allow lit-element patches

Author: daKmoR

packages/core/package.json

@@ -31,8 +31,8 @@
     "*.js"
   ],
   "dependencies": {
-    "lit-element": "2.1.0",
-    "lit-html": "1.0.0"
+    "lit-element": "~2.1.0",
+    "lit-html": "^1.0.0"
   },
   "devDependencies": {
     "@open-wc/demoing-storybook": "^0.2.0",

yarn.lock

@@ -8226,14 +8226,14 @@ listr@^0.14.2:
     p-map "^2.0.0"
     rxjs "^6.3.3"
 
-lit-element@2.1.0:
+lit-element@~2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/lit-element/-/lit-element-2.1.0.tgz#85bc3f1da0227f4b13de8a1be978229b9fa327e9"
   integrity sha512-0z/KHm1xZweivfOVRr8AKR06+D3k02u15m9s4jkuRdnGe5wfmEwePzrQQBsSZNILdnfJvfo3TJOeGhBCVZaPbw==
   dependencies:
     lit-html "^1.0.0"
 
-lit-html@1.0.0, lit-html@^1.0.0:
+lit-html@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/lit-html/-/lit-html-1.0.0.tgz#3dc3781a8ca68a9b5c2ff2a61e263662b9b2267b"
   integrity sha512-oeWlpLmBW3gFl7979Wol2LKITpmKTUFNn7PnFbh6YNynF61W74l6x5WhwItAwPRSATpexaX1egNnRzlN4GOtfQ==