Update node-snap7 requirement from ^1.0.7 to ^1.0.8

Updates the requirements on [node-snap7](https://github.com/mathiask88/node-snap7) to permit the latest version.
- [Release notes](https://github.com/mathiask88/node-snap7/releases)
- [Commits](mathiask88/node-snap7@v1.0.7...v1.0.8)

---
updated-dependencies:
- dependency-name: node-snap7
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -39,7 +39,7 @@
   },
   "optionalDependencies": {},
   "dependencies": {
-    "node-snap7": "^1.0.7",
+    "node-snap7": "^1.0.8",
     "iconv-lite": "0.6.3",
     "async": "^3.2.6",
     "@iobroker/adapter-core": "^3.1.6"