Upgrade leinjacker to remove error on 'lein ragtime migrate'

I was getting an exception when running 'lein ragtime migrate'

For example:

```shell
git checkout git@github.com:weavejester/ragtime.git &&
cd ragtime/ragtime.lein &&
lein ragtime migrate 
```

Raise this exception:

```shell
Exception in thread "main" java.lang.AssertionError: Assert failed: (vector? (:dependencies project []))
	at leinjacker.deps$add_if_missing.invoke(deps.clj:43)
	at leiningen.ragtime$add_ragtime_deps.invoke(ragtime.clj:7)
	at leiningen.ragtime$ragtime.doInvoke(ragtime.clj:15)
	at clojure.lang.RestFn.invoke(RestFn.java:425)
	at clojure.lang.Var.invoke(Var.java:419)
	at clojure.lang.AFn.applyToHelper(AFn.java:163)
	at clojure.lang.Var.applyTo(Var.java:532)
	at clojure.core$apply.invoke(core.clj:603)
	at leiningen.core.main$resolve_task$fn__1606.doInvoke(main.clj:132)
	at clojure.lang.RestFn.applyTo(RestFn.java:139)
	at clojure.lang.AFunction$1.doInvoke(AFunction.java:29)
	at clojure.lang.RestFn.applyTo(RestFn.java:137)
	at clojure.core$apply.invoke(core.clj:603)
	at leiningen.core.main$apply_task.invoke(main.clj:167)
	at leiningen.core.main$_main$fn__1665.invoke(main.clj:237)
	at leiningen.core.main$_main.doInvoke(main.clj:221)
	at clojure.lang.RestFn.invoke(RestFn.java:421)
	at clojure.lang.Var.invoke(Var.java:419)
	at clojure.lang.AFn.applyToHelper(AFn.java:163)
	at clojure.lang.Var.applyTo(Var.java:532)
	at clojure.core$apply.invoke(core.clj:601)
	at clojure.main$main_opt.invoke(main.clj:324)
	at clojure.main$main.doInvoke(main.clj:427)
	at clojure.lang.RestFn.invoke(RestFn.java:457)
	at clojure.lang.Var.invoke(Var.java:427)
	at clojure.lang.AFn.applyToHelper(AFn.java:172)
	at clojure.lang.Var.applyTo(Var.java:532)
	at clojure.main.main(main.java:37)
```

Upgrading leinjacker fixed this.