fix!: drop Node.js v12 support, require v14.15.0 or higher

BREAKING CHANGE: The agoric-sdk as a whole now requires/advises v14.

We're leaving the individual package.jsons alone until a specific updated
requirement is found for each (e.g. SwingSet will soon bump to v14 because it
will require WeakRef). We won't be testing v12 support anywhere, but it's
possible that individual packages will still work with v12 until we believe
otherwise.

closes #1925
closes #837

Co-authored-by: Mathieu Hofman <86499+mhofman@users.noreply.github.com>

.github/workflows/ag-solo-xs.yml.DISABLED

@@ -18,7 +18,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-node@v1
       with:
-        node-version: '12.x'
+        node-version: '14.x'
     - name: cache node modules
       uses: actions/cache@v1
       with:

.github/workflows/integration.yml

@@ -17,7 +17,7 @@ jobs:
 
     - uses: actions/setup-node@v1
       with:
-        node-version: '12.x'
+        node-version: '14.x'
     - name: cache node modules
       uses: actions/cache@v1
       with:

.github/workflows/test-all-packages.yml

@@ -14,7 +14,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: ['12.x', '14.x']
+        # TODO: ['14.x', '16.x']
+        node-version: ['14.x']
     steps:
     - uses: actions/checkout@v2
       with:
@@ -51,7 +52,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: ['12.x']
+        # note: only use one node-version
+        node-version: ['14.x']
     steps:
     - uses: actions/setup-node@v1
       with:
@@ -83,6 +85,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
+        # note: only use one node-version
         node-version: ['14.x']
     if: ${{github.event_name == 'push' && github.ref == 'refs/heads/master'}}
     steps:
@@ -122,6 +125,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
+        # note: only use one node-version
         node-version: ['14.x']
     if: ${{github.event_name == 'push' && github.ref == 'refs/heads/master'}}
     steps:
@@ -177,7 +181,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: ['12.x', '14.x']
+        # TODO: ['14.x', '16.x']
+        node-version: ['14.x']
     steps:
     - uses: actions/setup-node@v1
       with:
@@ -306,7 +311,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: ['12.x', '14.x']
+        # TODO: ['14.x', '16.x']
+        node-version: ['14.x']
     steps:
     - uses: actions/setup-node@v1
       with:
@@ -372,7 +378,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: ['12.x', '14.x']
+        # TODO: ['14.x', '16.x']
+        node-version: ['14.x']
     steps:
     - uses: actions/setup-node@v1
       with:
@@ -410,7 +417,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: ['12.x', '14.x']
+        # TODO: ['14.x', '16.x']
+        node-version: ['14.x']
     steps:
     - uses: actions/setup-node@v1
       with:
@@ -457,7 +465,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: ['12.x', '14.x']
+        # TODO: ['14.x', '16.x']
+        node-version: ['14.x']
     steps:
     - uses: actions/setup-node@v1
       with:
@@ -502,7 +511,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: ['12.x', '14.x']
+        # TODO: ['14.x', '16.x']
+        node-version: ['14.x']
     steps:
     - uses: actions/setup-node@v1
       with:
@@ -540,6 +550,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
+        # note: only use one node-version, maybe
         node-version: ['14.x']
     steps:
     - uses: actions/setup-node@v1

README.md

@@ -17,7 +17,8 @@ to use.
 ## Prerequisites
 
 * Git
-* Node.js (version 12.14.1 or higher)
+* Node.js LTS (version 14.15.0 or higher)
+  * we generally support the latest LTS release: use [nvm](https://github.com/nvm-sh/nvm) to keep your local system up-to-date
 * Yarn (`npm install -g yarn`)
 
 Any version of Yarn will do: the `.yarnrc` file should ensure that all

package.json

@@ -63,7 +63,7 @@
     "typescript": "^4.2.3"
   },
   "engines": {
-    "node": ">=12.14.1"
+    "node": ">=14.15.0"
   },
   "scripts": {
     "OFF-clean": "yarn workspaces run clean",