chore: revert peer api check removal

.github/workflows/peer-api.yml

@@ -0,0 +1,26 @@
+name: Ensure API Peer Dependency
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  peer-api-check:
+    runs-on: ubuntu-latest
+    container:
+      image: node:14
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install lerna
+        run: npm install -g lerna
+
+      - name: Install semver
+        run: npm install semver
+
+      - name: Check API dependency semantics
+        working-directory: packages
+        run: lerna exec --ignore propagation-validation-server --ignore @opentelemetry/api-metrics --ignore propagation-validation-server --ignore @opentelemetry/selenium-tests "node $(pwd)/scripts/peer-api-check.js"

scripts/peer-api-check.js

@@ -0,0 +1,37 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+const semver = require('semver');
+
+const appRoot = process.cwd();
+
+const packageJsonUrl = path.resolve(`${appRoot}/package.json`);
+const pjson = require(packageJsonUrl);
+
+if (pjson.dependencies && pjson.dependencies["@opentelemetry/api"]) 
+    throw new Error(`Package ${pjson.name} depends on API but it should be a peer dependency`);
+
+const peerVersion = pjson.peerDependencies && pjson.peerDependencies["@opentelemetry/api"]
+const devVersion = pjson.devDependencies && pjson.devDependencies["@opentelemetry/api"]
+if (peerVersion) {
+    if (!semver.subset(devVersion, peerVersion)) {
+        throw new Error(`Package ${pjson.name} depends on peer API version ${peerVersion} but version ${devVersion} in development`);
+    }
+    console.log(`${pjson.name} OK`);
+}