update version name and .npmignore

increase to 2.6.0 as we'll start package with the apk
at least for testing purpose.
remove experimental dir from the npm package.

.npmignore

@@ -1,6 +1,7 @@
 /.env
 /.gitmodules
 /.npmignore
+/.semaphore
 /*.tgz
 /build-remote.sh
 /CONTRIBUTING.md
@@ -14,3 +15,4 @@
 /run.sh
 /temp/
 /yarn-error.log
+/experimental

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@devicefarmer/minicap-prebuilt",
-  "version": "2.5.0",
+  "version": "2.6.0",
   "description": "Prebuilt binaries of minicap.",
   "keywords": [
     "minicap"