Update Mazeppa opam files

Author: hirrolot

packages/mazeppa/mazeppa.0.3.3/opam

@@ -11,7 +11,7 @@ depends: [
   "ocaml" {>= "5.1"}
   "dune" {>= "3.15"}
   "pprint"
-  "checked_oint" {>= "0.2.0"}
+  "checked_oint" {= "0.2.0"}
   "ppx_deriving"
   "ppx_string_interpolation"
   "ppx_yojson_conv"

packages/mazeppa/mazeppa.0.3.4/opam

@@ -11,7 +11,7 @@ depends: [
   "ocaml" {>= "5.1"}
   "dune" {>= "3.15"}
   "pprint"
-  "checked_oint" {>= "0.2.0"}
+  "checked_oint" {= "0.2.0"}
   "ppx_deriving"
   "ppx_string_interpolation"
   "ppx_yojson_conv"

packages/mazeppa/mazeppa.0.4.1/opam

@@ -11,7 +11,7 @@ depends: [
   "ocaml" {>= "4.14"}
   "dune" {>= "3.14"}
   "pprint"
-  "checked_oint" {>= "0.2.1"}
+  "checked_oint" {= "0.2.1"}
   "ppx_deriving"
   "ppx_string_interpolation"
   "ppx_yojson_conv"

packages/mazeppa/mazeppa.0.4.2/opam

@@ -11,7 +11,7 @@ depends: [
   "ocaml" {>= "4.14"}
   "dune" {>= "3.14"}
   "pprint"
-  "checked_oint" {>= "0.2.1"}
+  "checked_oint" {= "0.2.1"}
   "ppx_deriving"
   "ppx_string_interpolation"
   "ppx_yojson_conv"

packages/mazeppa/mazeppa.0.4.3/opam

@@ -11,7 +11,7 @@ depends: [
   "ocaml" {>= "4.14"}
   "dune" {>= "3.14"}
   "pprint"
-  "checked_oint" {>= "0.3.0"}
+  "checked_oint" {= "0.3.0"}
   "ppx_deriving"
   "ppx_string_interpolation"
   "ppx_yojson_conv"

packages/mazeppa/mazeppa.0.5.0/opam

@@ -11,7 +11,7 @@ depends: [
   "ocaml" {>= "4.14"}
   "dune" {>= "3.14"}
   "pprint"
-  "checked_oint" {>= "0.4.1"}
+  "checked_oint" {= "0.4.1"}
   "ppx_deriving"
   "ppx_string_interpolation"
   "ppx_yojson_conv"

packages/mazeppa/mazeppa.0.5.1/opam

@@ -11,7 +11,7 @@ depends: [
   "ocaml" {>= "4.14"}
   "dune" {>= "3.14"}
   "pprint"
-  "checked_oint" {>= "0.4.1"}
+  "checked_oint" {= "0.4.1"}
   "ppx_deriving"
   "ppx_string_interpolation"
   "ppx_yojson_conv"