maint: turf anemic pom.xml (#17)

Clojure tools.build now supports fully generating our `pom.xml` from edn.

In my (now deleted) `pom.xml` I had:
```
  <distributionManagement>
    <repository>
      <id>clojars</id>
      <name>Clojars repository</name>
      <url>https://clojars.org/repo</url>
    </repository>
  </distributionManagement>
```
I thought I needed this to be able to deploy to clojars, but maybe that
is some throwback to deploying with `mvn`.

build.clj

@@ -31,9 +31,20 @@
     (b/write-pom {:class-dir class-dir
                   :lib lib
                   :version version
-                  :scm {:tag (format "v%s" version)}
                   :basis basis
-                  :src-dirs ["src"]})
+                  :src-dirs ["src"]
+                  :scm {:url "https://github.com/lread/test-doc-blocks"
+                        :connection "scm:git:[email protected]:lread/test-doc-blocks.git"
+                        :developerConnection "scm:git:[email protected]:lread/test-doc-blocks.git"
+                        :tag (format "v%s" version)}
+                  :pom-data [[:description "Generate Clojure tests from AsciiDoc and CommonMark doc code blocks"]
+                             [:url "https://github.com/lread/test-doc-blocks"]
+                             [:licenses
+                              [:license
+                               [:name "Eclipse Public License"]
+                               [:url "http://www.eclipse.org/legal/epl-v10.html"]]]
+                             [:properties
+                              [:project.build.sourceEncoding "UTF-8"]]]})
     (b/copy-dir {:src-dirs ["src" "resources"]
                  :target-dir class-dir})
     (b/jar {:class-dir class-dir