Use mapping from external AstarBase (#39)

* isRegistered support

* working on it

* external check works for isRegister

* unit tested

* ci on all branches

* ci fix

* added Astar verifiaction details for V3

* more on  astar contract verification

* Shiden V4 plus test

* remove console.log

* Shiden upgraded to V4

.github/workflows/contract-test.yml

@@ -0,0 +1,24 @@
+name: 'AstarBase CI'
+
+on:
+  pull_request:
+    branches:
+      - '**'
+  push:
+    branches:
+      - '**'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+  defaults:
+    run:
+      working-directory: ./contract/shibuya
+
+  steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v2
+      with:
+        node-version: '16.x'
+        registry-url: 'https://registry.npmjs.org'
+    - run: npm install
+    - run: npx hardhat test