feat: get Filecoin.ClientRetrieve to actually save a file and update IPFS

.npmrc

@@ -1,4 +1,4 @@
-engine-strict=true
+engine-strict=false
 save-exact=true
 sign-git-commit=true
 sign-git-tag=true

scripts/skip-if-less-than-node-12.ts

@@ -0,0 +1,23 @@
+// To use this script, run `ts-node path/to/skip-if-less-than-node-12.ts || <command>`
+// This script will "succeed" if less than node@12, causing <command> to not execute
+// but also make look like the overall command was successful
+
+const majorVersionStringMatch = /^v([0-9]+)\./.exec(process.version);
+
+if (!majorVersionStringMatch || majorVersionStringMatch.length < 2) {
+  console.error(
+    "ERROR: Could not parse process.version for some reason. This shouldn't happen."
+  );
+  process.exit(0); // we exit with code 0 to prevent further scripts from running
+}
+
+const majorVersion = parseInt(majorVersionStringMatch[1], 10);
+
+if (majorVersion < 12) {
+  console.log(
+    `Skipping following command as the NodeJS version is ${majorVersion}, and it needs to be at least 12 to continue.`
+  );
+  process.exit(0);
+} else {
+  process.exit(1);
+}