add OEBlock chain (#2637)

* add OEBlock chain

* add icon OEBlock

* update info and icon

* fix width and heigh icon

_data/chains/eip155-156.json

@@ -0,0 +1,23 @@
+{
+  "name": "OEBlock Testnet",
+  "chain": "OEBt",
+  "rpc": ["https://testnet-rpc.oeblock.com/"],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "OEBlock",
+    "symbol": "OEB",
+    "decimals": 18
+  },
+  "infoURL": "https://www.oeblock.com/",
+  "shortName": "obe",
+  "chainId": 156,
+  "networkId": 156,
+  "icon": "oescan",
+  "explorers": [
+    {
+      "name": "OEScan explorer",
+      "url": "https://testnet.oescan.io",
+      "standard": "EIP3091"
+    }
+  ]
+}

_data/icons/oescan.json

@@ -0,0 +1,8 @@
+[
+  {
+    "url": "ipfs://QmdoQUfYqtkWMfjtoPv2KWDY4MxDDSsyWgwXtCx6jfkezz",
+    "width": 155,
+    "height": 177,
+    "format": "png"
+  }
+]