feat: add persistent storage (#30)

* refactor: remove unused default timeout

* feat: add persistent storage

Allows you to save the state to a file and load it upon restarting the app to restore the previous state.

* chore: upgrade to go 1.18

* use tinykv with generics

* build: add "-buildvcs=false" flag

Git is not available in golang:1.18-alpine image

.github/workflows/build.yml

@@ -11,10 +11,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.17
+    - name: Set up Go 1.18
       uses: actions/setup-go@v2
       with:
-        go-version: ^1.17
+        go-version: ^1.18
 
     - name: Check out code into the Go module directory
       uses: actions/checkout@v2

.github/workflows/release.yml

@@ -16,10 +16,10 @@ jobs:
           fetch-depth: 0
           persist-credentials: false
 
-      - name: Set up Go 1.17
+      - name: Set up Go 1.18
         uses: actions/setup-go@v2
         with:
-         go-version: ^1.17
+         go-version: ^1.18
 
       - name: Setup Node.js
         uses: actions/setup-node@v1