chore: add release-please automation (#659)

Author: willarmiros

package.json

@@ -7,7 +7,8 @@
   "types": "build/src/index.d.ts",
   "repository": "open-telemetry/opentelemetry-js-contrib",
   "scripts": {
-    "precompile": "tsc --version",
+    "precompile": "tsc --version && lerna run version --scope $(npm pkg get name) --include-filtered-dependencies",
+    "prewatch": "npm run precompile",
     "compile": "tsc --build tsconfig.json tsconfig.esm.json",
     "clean": "tsc --build --clean tsconfig.json tsconfig.esm.json",
     "test": "nyc ts-mocha -p tsconfig.json test/**/*.test.ts",