Switch to handrolled semver implementation

src/utils.js

@@ -108,4 +108,23 @@ exports.stack = (a, b) => {
             a, b
         }
     }
+}
+
+const semver = exports.semver = (str, name='') => {
+    const main = str.split('-')[0]
+    if (/^\d+\.\d+\.\d+$/.test(main)) {
+        const parts = main.split('.').map(v => parseInt(v))
+        return {major: parts[0], minor: parts[1], patch: parts[2]}
+    } else throw new Error(`Invalid semver "${str}" at ${name}!`)
+}
+
+const satisfies = exports.satisfies = (current, expected) => {
+    if (current.major === undefined) current = semver(current)
+    if (expected.major === undefined) expected = semver(expected)
+    return current.major === expected.major && (
+        current.minor > expected.minor || (
+            current.minor === expected.minor && 
+            current.patch >= expected.patch
+        )
+    )
 }