Get rid of warnings during compilation

When compiling the project, the following warnings are shown. We should get rid of these to have clean build output.

```
[Figwheel:WARNING] Compile Warning /home/simon/git/active-clojure/test/active/clojure/record_test.cljc line:272 column:1

map->GenerativeRecord at line 261 is being replaced

267 ;;; After evaluating the following expression, it is expected, that you get warnings like these
268 ;; [Figwheel:WARNING] Compile Warning: map->GenerativeRecord at line 212 is being replaced /Users/kaan/projekte/active-clojure/test/active/clojure/record_test.cljc line:217 column:1
269 ;; [Figwheel:WARNING] Compile Warning: generative-record? at line 212 is being replaced /Users/kaan/projekte/active-clojure/test/active/clojure/record_test.cljc line:217 column:1
270 ;; [Figwheel:WARNING] Compile Warning: make-generative-record at line 212 is being replaced /Users/kaan/projekte/active-clojure/test/active/clojure/record_test.cljc line:217 column:1
271
272 (define-record-type GenerativeRecord
^---
273 (make-generative-record)
274 generative-record?
275 [])
276
277 ;;; Nongenerative

[Figwheel:WARNING] Compile Warning /home/simon/git/active-clojure/test/active/clojure/record_test.cljc line:272 column:1

generative-record? at line 261 is being replaced

267 ;;; After evaluating the following expression, it is expected, that you get warnings like these
268 ;; [Figwheel:WARNING] Compile Warning: map->GenerativeRecord at line 212 is being replaced /Users/kaan/projekte/active-clojure/test/active/clojure/record_test.cljc line:217 column:1
269 ;; [Figwheel:WARNING] Compile Warning: generative-record? at line 212 is being replaced /Users/kaan/projekte/active-clojure/test/active/clojure/record_test.cljc line:217 column:1
270 ;; [Figwheel:WARNING] Compile Warning: make-generative-record at line 212 is being replaced /Users/kaan/projekte/active-clojure/test/active/clojure/record_test.cljc line:217 column:1
271
272 (define-record-type GenerativeRecord
^---
273 (make-generative-record)
274 generative-record?
275 [])
276
277 ;;; Nongenerative

[Figwheel:WARNING] Compile Warning /home/simon/git/active-clojure/test/active/clojure/record_test.cljc line:272 column:1

make-generative-record at line 261 is being replaced

267 ;;; After evaluating the following expression, it is expected, that you get warnings like these
268 ;; [Figwheel:WARNING] Compile Warning: map->GenerativeRecord at line 212 is being replaced /Users/kaan/projekte/active-clojure/test/active/clojure/record_test.cljc line:217 column:1
269 ;; [Figwheel:WARNING] Compile Warning: generative-record? at line 212 is being replaced /Users/kaan/projekte/active-clojure/test/active/clojure/record_test.cljc line:217 column:1
270 ;; [Figwheel:WARNING] Compile Warning: make-generative-record at line 212 is being replaced /Users/kaan/projekte/active-clojure/test/active/clojure/record_test.cljc line:217 column:1
271
272 (define-record-type GenerativeRecord
^---
273 (make-generative-record)
274 generative-record?
275 [])
276
277 ;;; Nongenerative
```