chore: replace secp256k1 with coincurve (#3609)

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "lnbits"
-version = "1.3.1"
+version = "1.4.0-rc1"
 requires-python = ">=3.10,<3.13"
 description = "LNbits, free and open-source Lightning wallet and accounts system."
 authors = [{ name = "Alan Bits", email = "alan@lnbits.com" }]
@@ -41,10 +41,6 @@ dependencies = [
     "fastapi-sso==0.18.0",
     # needed for boltz, lnurldevice, watchonly extensions
     "embit==0.8.0",
-    # needed for lnurlp, nostrclient, nostrmarket
-    "secp256k1==0.14.0",
-    # keep for backwards compatibility with lnurlp
-    "environs==14.2.0",
     # needed for scheduler extension
     "python-crontab==3.2.0",
     "pynostr==0.6.2",
@@ -54,6 +50,7 @@ dependencies = [
     "bcrypt==4.3.0",
     "jsonpath-ng==1.7.0",
     "pillow>=12.0.0",
+    "python-dotenv>=1.2.1",
 ]
 
 [project.scripts]