fix: build properly when using libsecp256k1

[whylee259]

Description

• fix the receiver of function VerifySignature
• update the ostracon version which has no effect for the tag of libsecp256k1
• update makefile

related to: #173
closes: #XXXX

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[wetcod]

LGTM

[codecov]

Codecov Report

Merging #195 (6f42a29) into v2/develop (8353d2a) will increase coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           v2/develop     #195   +/-   ##
===========================================
  Coverage       53.09%   53.09%           
===========================================
  Files             688      688           
  Lines           49057    49057           
===========================================
+ Hits            26046    26048    +2     
+ Misses          20116    20115    -1     
+ Partials         2895     2894    -1     

Impacted Files	Coverage Δ
x/wasm/internal/keeper/keeper.go	86.52% <0.00%> (+0.37%)	⬆️