change ol-pmtiles to TypeScript [#312] (#444)

* change ol-pmtiles to TypeScript [#444]

* olpmtiles: 1.0.0
* accept either a string or pmtiles.Source for the url option
* package.json works for ESM/CJS/IIFE [#312, #443]
* replace npm install with npm ci on github actions

openlayers/tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "target": "es2021",
+    "lib": ["es2021", "dom"],
+    "strict": true,
+    "moduleResolution": "node",
+    "paths": {
+    },
+    "types": [],
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["src/*.ts"]
+}