fix(validate2Single): Added alternative SLP TXID validator

package.json

@@ -31,6 +31,7 @@
     "@psf/bch-js": "^3.6.3",
     "apidoc": "^0.23.0",
     "axios": "^0.19.0",
+    "bitcoin-rpc-promise-retry": "^1.3.0",
     "bitcore-lib-cash": "^8.20.3",
     "body-parser": "^1.18.3",
     "cookie-parser": "~1.4.3",
@@ -55,6 +56,7 @@
     "pg": "^8.0.0",
     "pg-hstore": "^2.3.2",
     "rate-limiter-flexible": "^2.0.0",
+    "slp-validate": "^1.2.2",
     "winston": "^3.2.1",
     "winston-daily-rotate-file": "^4.0.0"
   },