[Chore] Use nyan-interpolation from Hackage

Problem: we take nyan-interpolation from GitHub, which is harder
to manage than if we take it from Hackage.
Fortunately, the latest version is now available and suits us.

Solution: specify Hackage version of nyan-interpoation[-core]
in extra-deps.

stack.yaml

@@ -12,8 +12,5 @@ packages:
 extra-deps:
 - firefly-0.2.1.0@sha256:e9d73486464c3e223ec457e02b30ddd5b550fdbf6292b268c64581e2b07d888b,1519
 - cmark-gfm-0.2.5
-- git: https://github.com/serokell/nyan-interpolation
-  commit: 348355385466d6d0116251b463a2842ecce0360d
-  subdirs:
-  - full
-  - core
+- nyan-interpolation-core-0.9.2
+- nyan-interpolation-0.9.2

stack.yaml.lock

@@ -19,31 +19,19 @@ packages:
   original:
     hackage: cmark-gfm-0.2.5
 - completed:
-    commit: 348355385466d6d0116251b463a2842ecce0360d
-    git: https://github.com/serokell/nyan-interpolation
-    name: nyan-interpolation
+    hackage: nyan-interpolation-core-0.9.2@sha256:930202fafc4e9472f9aed3d216a459e23454db500bfd0e0a5af2a4e5c5202096,4523
     pantry-tree:
-      sha256: ede424e6010640f31a223865f2136570ca1870b5ae5ffeeebfc499c4f7043482
-      size: 714
-    subdir: full
-    version: '0.9'
+      sha256: 5781e80383996a6bea95a545e4f0e70466bebf0fe2d388f334cd42e9f35469d5
+      size: 1464
   original:
-    commit: 348355385466d6d0116251b463a2842ecce0360d
-    git: https://github.com/serokell/nyan-interpolation
-    subdir: full
+    hackage: nyan-interpolation-core-0.9.2
 - completed:
-    commit: 348355385466d6d0116251b463a2842ecce0360d
-    git: https://github.com/serokell/nyan-interpolation
-    name: nyan-interpolation-core
+    hackage: nyan-interpolation-0.9.2@sha256:fb0b07ef6a9f8ca4d2e1db2f2df841c649556d9f6cff894ebf6b9ffbb7c25003,4276
     pantry-tree:
-      sha256: 4802161ce5d38f895e3b5106c789bfbe20b8d12c2f6c5fcba3999bec105283bc
-      size: 1516
-    subdir: core
-    version: '0.9'
+      sha256: 258878b8660782bef633fe3800c08fff2fa90165fd2a0793fa73836d8ff274c3
+      size: 662
   original:
-    commit: 348355385466d6d0116251b463a2842ecce0360d
-    git: https://github.com/serokell/nyan-interpolation
-    subdir: core
+    hackage: nyan-interpolation-0.9.2
 snapshots:
 - completed:
     sha256: ef98d70e4018bf01feb00ccdcd33ab26d056dbb71b38057c78fdd0d1ec671c85