fix: peer-depend on any version of typescript

Closes #604.

package.json

@@ -62,7 +62,7 @@
     "eslint-plugin-import": "^2.22.1",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-promise": "^4.2.1 || ^5.0.0",
-    "typescript": "^3.9 || ^4.0.0"
+    "typescript": "*"
   },
   "devDependencies": {
     "@arkweid/lefthook": "0.7.6",

readme.md

@@ -15,7 +15,7 @@ because your decisions regarding version ranges and range specifiers may vary.
 
 ```
 npm install --save-dev \
-  typescript@^4 \
+  typescript@\* \
   eslint@^7.12.1 \
   eslint-plugin-promise@^5.0.0 \
   eslint-plugin-import@^2.22.1 \

src/index.test.ts

@@ -184,8 +184,12 @@ test('Dependencies range types', async (t) => {
     t.true(range.startsWith(specifier), `Regular dependency ${name} starts with \`${specifier}\`.`)
   }
   for (const [name, range] of Object.entries(ourPeerDeps)) {
-    const specifier = '^'
-    t.true(range.startsWith(specifier), `Peer dependency ${name} starts with \`${specifier}\`.`)
+    if (name === 'typescript') {
+      t.is(range, '*', 'Peer dependency typescript is `*`')
+    } else {
+      const specifier = '^'
+      t.true(range.startsWith(specifier), `Peer dependency ${name} starts with \`${specifier}\`.`)
+    }
   }
   for (const [name, range] of Object.entries(ourDevDeps)) {
     t.regex(range, /^\d/, `Dev dependency ${name} is exact`)
@@ -247,7 +251,9 @@ test('npm install args in readme satisfy peerDeps', async (t) => {
   if (match.length > 2) throw new Error('matched multiple code blocks')
   const installArgRanges = Object.fromEntries(
     match[1]
-      .split('\\')
+      .replace(/\\/g, '')
+      .trim()
+      .split('\n')
       .slice(1)
       .map(arg => {
         const { name, fetchSpec: range } = npmPkgArg(arg.trim())