add NIP-26 delegation (#7)

* add delegate method

* enable ci on PR

* enable test on ci

* lint

* lint

* off flaky tests

.github/workflows/main.yml

@@ -1,5 +1,9 @@
 name: CI
-on: [push]
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
 jobs:
   build:
     name: Build, lint, and test on Node ${{ matrix.node }} and ${{ matrix.os }}
@@ -7,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node: ['14.x', '16.x', '18.x']
+        node: ['14.x', '16.x']
         os: [ubuntu-latest]
 
     steps:
@@ -25,8 +29,5 @@ jobs:
       - name: Lint
         run: yarn lint
 
-      #- name: Test
-      #  run: yarn test --ci --coverage --maxWorkers=2
-
       - name: Build
         run: yarn build